[1] Ehresmann C.:
Les connexions infinitésimales dans un espace fibré diffírentiable. Colloque de topologie, Bruxelles 1950, 29-55.
MR 0042768
[2] Virsik J.:
A generalized point of view to higher order connections on fibre bundles. Czech. Math. J. 19 (94) (1969), 110-142.
MR 0242187
[5] Kosmann Y.: C. R. Acad. Sci. Paris, 262 (1966), 289-292, 394-397, 264 (1967), 355-358.
Zbl 0136.18403