[1] DE ANDRÉS L. C., DE LEÓN M., RODRIGUES P. R.: Connections on tangent bundles of higher order. Demonstratio Math. XXII (1989), 607-632. MR 1041903 | Zbl 0701.53050

[2] CRAMPIN M.: Alternative Lagrangians in particle dynamics. In: Proc. of Conf. Diff. Geom. and its Appl., Brno 1986, J. E. P. University, Brno, 1987, pp. 1-12. MR 0923340

[3] DEKRÉT A.: Ordinary differential equations and connections. In: Proc. of Conf. Diff. Geom. and Appl., Brno 1989, World Scientific, Singapore, 1990, pp. 27-32. MR 1062002

[4] DEKRÉT A.: Mechanical structures and connections. In: Proc. of Conf. Diff. Geom. and Appl., Dubrovnik 1988, University of Novi Sad, Novi Sad, 1989, pp. 121-131. MR 1040061

[5] DEKRÉT A.: Connections deduced from mechanical system of second order. In: Proc. of Colloquium of Diff. Geom., Eger (Hungary) 1989, Soc. J. Bolyai, Budapest, 1992, pp. 201-213. MR 1211657

[6] KLEIN J.: Espaces variationnels et mechanique. Ann. Inst. Fourier (Grenoble) 12 (1962), 1-124. MR 0215269

[7] KLEIN J.: Almost symplectic structures in dynamics. In: Proc. of Conf. Diff. Geom. and its Appl., Brno 1986, J. E. P. University, Brno, 1987, pp. 79-90. MR 0923345

[8] DE LEÓN M., RODRIGUES P. R.: Generalized Classical Mechanics and Field Theory. North-Holland Math. Stud. 112, North-Holland, Amsterdam-New York, 1985. MR 0808964 | Zbl 0581.58015

[9] TULCZYJEW W.: Sur la differential de Lagrange. C. R. Acad. Sci. Paris Ser. I 280 (1975), 1295-1298. MR 0377987