Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1986__22_2_a4, author = {Krupkov\'a, Olga}, title = {Lepagean 2-forms in higher order {Hamiltonian} mechanics. {I.} {Regularity}}, journal = {Archivum mathematicum}, pages = {97--120}, publisher = {mathdoc}, volume = {22}, number = {2}, year = {1986}, mrnumber = {868124}, zbl = {0637.58002}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1986__22_2_a4/} }
Krupková, Olga. Lepagean 2-forms in higher order Hamiltonian mechanics. I. Regularity. Archivum mathematicum, Tome 22 (1986) no. 2, pp. 97-120. http://geodesic.mathdoc.fr/item/ARM_1986__22_2_a4/