**A. RESEARCH ARTICLES**

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*An algorithm to estimate the vertices of a tetrahedron from uniform random points inside**(joint paper with A.D. Vîlcu),***Annali di Matematica Pura ed Applicata**, Volume 197, Issue 2, April 2018, 487–500. - *
*On a generalization of a class of production functions**,***Applied Economics Letters**, Volume 25, Issue 2, 2018, 106–110. - *
*Hidden symmetries in Sasaki–Einstein geometries**(joint paper with V. Slesar and M. Visinescu),***Physics of Atomic Nuclei**, Volume 80, Issue 4, July 2017, 801–807. - *
*Optimal inequalities for the normalized δ-Casorati curvatures of submanifolds in Kenmotsu space forms**(joint paper with C.W. Lee and J.W. Lee),***Advances in Geometry**, Volume 17, No. 3, July 2017, 355-362. *A survey on the geometry of production models in economics**(joint paper with A.D. Vîlcu),***Arab Journal of Mathematical Sciences**, Volume 23, No. 1 (2017), 18-31.

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*On generic submanifolds of manifolds endowed with metric mixed 3-structures**,***Communications in Contemporary Mathematics**, Volume 18, No. 6, 1550081 (2016) [21 pages].

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*Toric data and Killing forms on homogeneous Sasaki-Einstein manifold $T^{1,1}$**(joint paper with V. Slesar and M. Visinescu),***Romanian Journal of Physics**, Volume 61, Nos. 1-2, January 2016, 260–275.

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*Some characterizations of the quasi-sum production models with proportional marginal rate of substitution**(joint paper with A.D. Vîlcu),***Comptes Rendus Mathematique**, Volume 353, Issue 12, December 2015, 1129–1133.

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*Toric data, Killing forms and complete integrability of geodesics in Sasaki–Einstein spaces $Y^{p,q}$**(joint paper with V. Slesar and M. Visinescu),***Annals of Physics**, Volume 361 (2015), 548–562. - *
*A new proof for some optimal inequalities involving generalized normalized δ-Casorati curvatures**(joint paper with C.W. Lee and J.W. Lee),***Journal of Inequalities and Applications**2015, 2015:310. - *
*Symplectic potential, complex coordinates and special Killing forms on toric Sasaki-Einstein spaces**(joint paper with V. Slesar and M. Visinescu),***Proceedings of the Romanian Academy – Series A**, Volume 16, Number 4, November 2015, 505–512.

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*Optimal inequalities for the Casorati curvatures of submanifolds of generalized space forms endowed with semi-symmetric metric connections**(joint paper with C.W. Lee, J.W. Lee and D.W. Yoon),***Bull. Korean Math. Soc.**, Volume 52, No. 5, September 2015, 1631-1647.

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*Statistical manifolds with almost quaternionic structures and quaternionic Kähler-like statistical submersions**(joint paper with A.D. Vîlcu),***Entropy**, Volume 17, Number 9, September 2015, 6213-6228.

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*Inequalities for generalized normalized δ-Casorati Curvatures of slant submanifolds in quaternionic space forms**(joint paper with J. Lee),***Taiwanese Journal of Mathematics**, Volume 19, Number 3, June 2015, 691-702. - *
*Hidden symmetries on toric Sasaki-Einstein spaces**(joint paper with V. Slesar and M. Visinescu),***EPL (Europhysics Letters)**, Volume 110, Number 3, May 2015, 31001 (6 pp). - *
*Special Killing forms on toric Sasaki–Einstein manifolds**(joint paper with V. Slesar and M. Visinescu),***Physica Scripta**, Volume 89, Number 12, December 2014, 125205 (7 pp). - **
*Killing forms and toric Sasaki-Einstein spaces**(joint paper with V. Slesar and M. Visinescu),***Journal of Physics: Conference Series**, Volume 563 (2014), 012033. - *
*Inequalities for the Casorati curvatures of slant submanifolds in quaternionic space forms**(joint paper with V. Slesar and B. Șahin),***Journal of Inequalities and Applications**2014, 2014:123 . - *
*Geometric classifications of homogeneous production functions**(joint paper with B.Y. Chen),***Applied Mathematics and Computation**, Volume 225, December 2013, 345–351. - *
*Transverse Killing and twistor spinors associated to the basic Dirac operators**(joint paper with A.M. Ionescu, V. Slesar and M. Vişinescu),***Reviews in Mathematical Physics**, Volume 25, Issue 08, September 2013, Article ID 1330011, 21 pages. - *
*On Homogeneous Production Functions with Proportional Marginal Rate of Substitution**(joint paper with A.D. Vîlcu),***Mathematical Problems in Engineering**, Volume 2013 (2013), Article ID 732643, 5 pages. - *
*On Chen invariants and inequalities in quaternionic geometry**,***Journal of Inequalities and Applications**2013, 2013:66. - *
*Mixed paraquaternionic 3-submersions**,***Indagationes Mathematicae**, Vol. 24 (2013), No. 2, 474–488. - *
*Canonical foliations on paraquaternionic Cauchy–Riemann submanifolds**,***Journal of Mathematical Analysis and Applications**, Vol. 399 (2013), No. 2, 551–558. - *
*Slant submanifolds of quaternionic space forms**,***Publicationes Mathematicae Debrecen**, Vol. 81 (2012), No. 3-4(10), 397-413. - *
*Hidden Symmetries of Euclideanised Kerr-NUT-(A)dS Metrics in Certain Scaling Limits**(joint paper with M. Vişinescu),***Symmetry, Integrability and Geometry – Methods and Applications**, 8 (2012), 058, 15 pages. - *
*Curvature properties of pseudo-sphere bundles over praquaternionic manifolds**(joint paper with R.C. Voicu),***International Journal of Geometric Methods in Modern Physics**, Volume 9, Number 3/2012, 1250024 (23 pages). - *
*Ruled CR-submanifolds of locally conformal Kähler manifolds**,***Journal of Geometry and Physics**, Volume 62, Number 6/2012, 1366-1372. - *
*Submanifolds in manifolds with metric mixed 3-structures**(joint paper with S. Ianuş and L. Ornea),***Mediterranean Journal of Mathematics**, Volume 9, Number 1/2012, 105-128. *Conformal Killing-Yano tensors on higher dimensional spacetimes endowed with special structures**(joint paper with M. Visinescu, S. Ianuş and A. Visinescu),***Proceedings of the Twelfth Marcel Grossmann Meeting on General Relativity. Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories**, Volume Editors: T. Damour, R. Jantzen and R. Ruffin, World Scientific (2011), 1970-1972.*Harmonic maps and Riemannian submersions between manifolds endowed with special structures**(joint paper with S. Ianuş and R.C. Voicu),***Banach Center Publications**, 93 (2011), 277-288.- *
*Para-hyperhermitian structures on tangent bundles**,***Proceedings of the Estonian Academy of Sciences**, Volume 60, Number 3 / September, 2011, 165-173. - *
*On some geometric properties of the generalized CES production functions**(joint paper with A.D. Vîlcu),***Applied Mathematics and Computation**, Volume 218, Number 1 / September, 2011, 124-129. - *
*Riemannian submersions from almost contact metric manifolds**(joint paper with S. Ianuş, A.M. Ionescu and R. Mocanu),***Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg**, Volume 81, Number 1 / April, 2011, 101-114. - *
*A geometric perspective on the generalized Cobb–Douglas production functions**,***Applied Mathematics Letters**, Volume 24, Number 5 / May, 2011, 777-783. - *
*Hidden symmetries and Killing tensors on curved spaces*

*(joint paper with S. Ianuş and M. Visinescu),***Physics of Atomic Nuclei**, Volume 73, Number 11 / November, 2010, 1925-1930. - *
*Paraquaternionic CR-submanifolds of paraquaternionic Kähler manifolds and semi-Riemannian submersions**(joint paper with S. Ianuş and S. Marchiafava),***Central European Journal of Mathematics**, Volume 8, Number 4 / August, 2010, 735-753. - *
*3-submersions from QR-hypersurfaces of quaternionic Kähler manifolds**,***Annales Polonici Mathematici**, Volume 98, Number 3, 2010, 301-309. - *
*Semi-Riemannian hypersurfaces in manifolds with metric mixed 3-structures**(joint paper with S. Ianuş),***Acta Mathematica Hungarica**, Volume 127, Numbers 1-2 / April, 2010, 154-177. - *
*B.Y. Chen Inequalities for Slant Submanifolds in Quaternionic Space Forms**,***Turkish Journal of Mathematics**, Volume 34, Issue 1, 2010, 115-128. - *
*Riemannian foliations on quaternion CR-submanifolds of an almost quaternion Kähler product manifold**,***Proceedings of the Indian Academy of Sciences – Mathematical Sciences**, vol. 119, No. 5, 2009, 611-618. - *
*A new class of semi-Riemannian submersion**,***Romanian Journal of Physics**, Vol. 54, Nr. 9–10 (2009), 815–821. - *
*Conformal Killing-Yano tensors on manifolds with mixed 3-structures**(joint paper with S. Ianuş and M. Vişinescu),***Symmetry, Integrability and Geometry – Methods and Applications**, 5 (2009), 022, 12 pages. - **
*Paraquaternionic manifolds and mixed 3-structures**(joint paper with S. Ianuş),***Differential Geometry: Proceedings of the VIII International Colloquium (July 7-11, 2008, Santiago de Compostela, Spain)**, Eds.Jesús A Alvarez López& Eduardo García-Río, World Scientific Publishing Company 2009, 276-285. - *
**Some constructions of almost para-hyperhermitian structures on manifolds and tangent bundles***(joint paper with S. Ianuş),***International Journal of Geometric Methods in Modern Physics**, vol. 5, Nr. 6, 2008, 893-903. - *
*Riemannian submersions from quaternionic manifolds**(joint paper with S. Ianuş and R. Mazzocco),***Acta Applicandae Mathematicae**, vol. 104, Nr. 1/2008, pg. 83-89. - *
*Foliations on quaternion CR-submanifolds**(joint paper with S. Ianuş and A.M. Ionescu),***Houston Journal of Mathematics**, vol. 33, Nr. 3, 2008, pg. 739-751. - *
*Harmonic maps from quaternionic Kähler manifolds**(joint paper with S. Ianuş and R. Mazzocco),***Journal of Nonlinear Mathematical Physics**, vol. 15, issue 1, 2008, pg. 1-8. - **
**Normal semi-invariant submanifolds of paraquaternionic space forms and mixed 3-structures***,***Proceedings of The International Conference „Differential Geometry and Dynamical Systems”, Bucharest, October 5-7, 2007, BSG Proceedings**15 (2008), Geometry Balkan Press, pp. 221-229. **On the existence of harmonic metrics on manifolds endowed with quaternionic structures**(joint paper with A.D. Vîlcu),**Proceedings of the 4-th National Conference on Applied Physics, Galati, September 25-26, 2008, The Annals of The “Dunarea de Jos” University of Galati, Mathematics, Physics, Chemistry, Informatics, Fascicle II, N.S.**, Year II (XXXI), 2008, 94-100.**Hypersurfaces of paraquaternionic space forms**(joint paper with S. Ianuş),**Proceedings of the 3rd Baltic-Nordic Workshop, Algebra, Geometry, and Mathematical Physics, Gőteborg, October 11–13, 2007, Journal of Generalized Lie Theory and Applications**, vol. 2, No. 3 /2008, 175-179.**Some remarks on harmonic metrics on hyper-Kähler manifolds**(joint paper with A.D. Vîlcu), JP Journal of Geometry and Topology, vol. 7, Issue 3, 2007, pg. 397-403.**A note on paraquaternionic ma**nifolds (joint paper with A.M. Ionescu),**Missouri Journal of Mathematical Sciences**, vol. 19, Issue #3 – Fall 2007, pg. 213-218.**Submanifolds of an almost paraquaternionic Kähler product manifold**,**International Mathematical Forum**, vol. 2, Nr. 15/2007, pg. 735-746.**Semi-Riemannian submersions from normal semi-invariant submanifolds**,**Bul. Inst. Polit. Iaşi, Secţia Matematică, Mecanică Teoretică, Fizică**, Tomul LIII (LVII), Fasc. 5 (2007), pg. 413-421.**A Schur-type theorem on an indefinite quaternionic Kahler manifold**,**International Journal of Contemporary Mathematical Sciences**, vol. 2, Nr. 11/2007, pg. 529-536.(joint paper with A.M. Ionescu),**Curvature identities on almost C – manifolds****Proceedings of The International Conference**, vol. 14 (49)/2007 – Series B, 127-132.*Riemannian Geometry and Applications: Dedicated to the memory of Radu Rosca*, Braşov, June 21-26, 2007, Bulletin of The Transilvania University of Brasov- *
*Real lightlike hypersurfaces of paraquaternionic Kähler manifolds**(joint paper with S. Ianuş and R. Mazzocco),***Mediterranean Journal of Mathematics**, vol. 3, Nr. 3-4/2006, pg. 581-592. **Product of paraquaternionic Kähler manifolds**,**Bull. Math. Soc. Sci. Math. Roumanie**48(96), No. 3 (2005), 345-355.**Some submersions of extrinsic hyperspheres of a Bochner-Kähler manifold**,**Rendinconti del Circolo Matematico di Palermo**, vol. LIV (2005), pg. 343-351.

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**B. RESEARCH MONOGRAPHS/CHAPTERS **

*Paraquaternionic CR-submanifolds, in:***Geometry of Cauchy-Riemann Submanifolds**, Editors: Sorin Dragomir, Mohammad Hasan Shahid, Falleh R. Al-Solamy, Springer, 2016, Chapter 13, 361-390.Differential Geometry – Dynamical Systems Monographs 9,*Contributions to the study of quaternionic manifolds,***Geometry Balkan Press, 2007.**

*ISI Journal

**ISI Proceedings

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