@article{GDZPPN002541165,
title = {Comments On The Canonical Formalism Of Time-Dependent Higher Order Lagrangians.},
journal = {Revista colombiana de matematicas},
volume = {21},
year = {1987},
pages = {47-64},
zbl = {0671.58014},
url = {http://dml.mathdoc.fr/item/GDZPPN002541165}
}
Rodrigues, Paulo R.; Leon de, Manuel de. Comments On The Canonical Formalism Of Time-Dependent Higher Order Lagrangians.. Revista colombiana de matematicas, Tome 21 (1987) pp. 47-64. http://gdmltest.u-ga.fr/item/GDZPPN002541165/