[1] M. Crampin G. E. Prince, and G. Thompson: A geometrical version of the Helmholtz conditions in time dependent Lagrangian dynamics. J. Phys. A: Math. Gen., 17: 1437- 1447, 1984. DOI 10.1088/0305-4470/17/7/011 | MR 0748776

[2] L. C. de Andres M. de León, and P. R. Rodrigues: Connections on tangent bundles of higher order. Demonstratio Mathematica, 22(3): 607-632, 1989. MR 1041903

[3] L. C. de Andres M. de León, and P. R. Rodrigues: Connections on tangent bundles of higher order associated to regular Lagrangians. Geometriae Dedicata, 39: 12-18, 1991. MR 1116206

[4] M. de León, P. R. Rodrigues: Dynamical connections and nonautonomous Lagrangian systems. Ann. Fac. Sci. Toulouse, IX: 171-181, 1988.

[5] M. de León, P. R. Rodrigues: Generalized Classical Mechanics and Field Theory. North-Holland, 1985. MR 0808964

[6] A. Dekrét: Ordinary differential equations and connections. In Proc. Conf. Diff. Geom. and Its Appl., Brno 1989, pp. 27-32, 1990. MR 1062002

[7] M. Doupovec, I. Kolář: Natural affinors on time-dependent Weil bundles. to appear. MR 1189217

[8] D. J. Saunders: The Geometry of Jet Bundles. London Mathematical Society Lecture Note Series 142, Cambridge University Press, 1989. MR 0989588 | Zbl 0665.58002

[9] D. J. Saunders: Jet fields, connections and second-order differential equations. J. Phys. A: Math. Gen, 20: 3261-3270, 1987. DOI 10.1088/0305-4470/20/11/029 | MR 0914055 | Zbl 0627.70013

[10] A. Vondra: On some connections related to the geometry of regular higher-order dynamics. preprint.

[11] A. Vondra: Semisprays, connections and regular equations in higher-order mechanics. In Proc. Conf. Diff. Geom. and Its Appl., Brno 1989, pp. 276-287, 1990. MR 1062030

[12] A. Vondra: Sprays and homogeneous connections on $R \times TM$. to appear. MR 1222283 | Zbl 0790.53028