Book:

Papers:

Nonlinear connections and the problem of metrizability,
Publ. Math. Debrecen 42 (1993), no. 12, 175192, (with J. Szilasi) 
Sur le probleme inverse du calcul des variations:
existence de lagrangiens associes a un spray dans le cas isotrope,
Ann. Inst. Fourier 49 (1999), no. 4, 13871421. (with J. Grifone) 
Graded Lie algebra associated to a SODE,
Publ. Math. Debrecen 58 (2001), no. 12, 249 262. 
On the linearizability of 3webs,
Nonlinear Analysis, 47, (2001), 26432656, (with J. Grifone and J. Saab), 
Inverse problem of the calculus of variations on Lie groups,
Differential Geom. Appl. 23 (2005), no. 3, 257281. (with G. Thompson), 
Invariant Shen connections and geodesic orbit spaces,
Period. Math. Hungar. 51 (2005), no. 1, 3751., (with P.T. Nagy), 
An invariant variational principle for canonical flows on Lie groups,
J. Math. Phys. 46 (2005), no. 11, 112902, 11 pp., 
The EulerLagrange PDE and Finsler metrizability,
Houston Journal of Mathematics, 32 no. 1, (2006) pp. 7998., 
Linearizable 3webs and the Gronwall conjecture,
Publ. Math. Debrecen, 71, 2007, 12, 16 (with J. Grifone and J. Saab), 
On the problem of linearizability of a 3web,
Nonlinear Analysis, vol. 68, (6), 2008, pp. 15951602 
New idea of intestinal lengthening and tailoring,
Pediatr Surg Int. 2011 Sep; 27(9): 100913. Epub 2011 Apr 17.,
(with Cserni T, Takayasu H, Muzsnay Z, Varga G, Murphy F, Folaranmi SE, Rakoczy G.) 
Projective Metrizability and Formal Integrability,
Symmetry, Integrability and Geometry: Methods and Applications (SIGMA),
7, paper 114. p. 22, 2011, (with I. Bucataru) 
Tangent Lie algebras to the holonomy group of a Finsler manifold
Communications in Mathematics 19 (2011) 137147, (with P.T. Nagy) 
Finsler manifolds with nonRiemannian holonomy,
Houston Journal of Mathematics, 38 no. 1, (2012) pp. 7792., (with P.T. Nagy) 
Projective and Finsler metrizability for sprays:
parameterizationrigidity of the geodesics
International Journal of Mathematics Vol. 23, No. 9 (2012) 1250099, (with I. Bucataru) 
Witt algebra and the curvature of the Heisenberg group
Communications in Mathematics 20, (2012), 3340, (with P.T. Nagy) 
Sprays metrizable by Finsler functions of constant flag curvature
Differential Geom. Appl. 31 (2013), no. 3, 405415. (with I. Bucataru) 
Projectively flat Finsler manifolds with infinite dimensional holonomy
Forum Mathematicum, 27, 2, 2015, pp 767–786, (with P.T. Nagy) 
Metrizable isotropic secondorder differential equations and Hilbert's fourth problem
Journal of the Aust Math. Soc., 97, 1, 2014, pp 2747,
DOI:dx.doi.org/10.1017/S1446788714000111 (with I. Bucataru) 
Characterization of projective Finsler manifolds of constant curvature having infinite dimensional holonomy group
Publ. Math. Debrecen, 84/12 (2014), 17–28 DOI: 10.5486/PMD.2014.5803 (with P.T. Nagy) 
Finsler 2manifolds with maximal holonomy group of infinite dimension
Differential Geometry and its Applications, Vol. 39, 2015, Pages 1–9
doi:10.1016/j.difgeo.2015.01.001 (with P.T. Nagy) 
Nonexistence of Funk functions for Finsler spaces of nonvanishing scalar flag curvature
Comptes Rendus Mathematique, Volume 354, Issue 6, June 2016, Pages 619622,
doi:10.1016/j.crma.2016.04.001 (with I. Bucataru) 
On the projective Finsler metrizability and the integrability of Rapcsák equation
Czechoslovak Mathematical Journal, vol. 67, no. 2 (2017), pp. 469495,
doi: 10.21136/CMJ.2017.001016, (with T. Milkovszki) 
Invariant Metrizability and Projective Metrizability on Lie Groups and Homogeneous Spaces
Mediterranean Journal of Mathematics, December 2016, Volume 13, Issue 6, pp 4567–4580
doi: 10.1007/s0000901607620 (with I. Bucataru, T. Milkovszki) 
Freedom of h(2)variationality and metrizability of sprays
Differential Geometry and its Applications, Volume 54, Part A, October 2017, Pages 194207
https://ttps://doi.org/10.1016/j.difgeo.2017.03.020 (with S.G. Elgend) 
Tangent Lie Algebra of a Diffeomorphism Group and Application to Holonomy Theory.
The Journal of Geometric Analysis (2020), 30: 107–123 , doi.org/10.1007/s12220018001383, (with B. Hubicska) 
Metrizability of holonomy invariant projective deformation of sprays
Differential Geometry and its Applications, Volume 54, Part A, October 2017, Pages 194207
DOI: https://doi.org/10.4153/S0008439520000016 (with S.G. Elgend)