@article{GDZPPN002028719,
title = {Sufficiency Conditions Under Which a Lagrangian is an Ordinary Divergence.},
journal = {Aequationes mathematicae},
volume = {13},
year = {1975},
pages = {232-241},
zbl = {0311.49030},
url = {http://dml.mathdoc.fr/item/GDZPPN002028719}
}
Horndeski, Gregory Walter. Sufficiency Conditions Under Which a Lagrangian is an Ordinary Divergence.. Aequationes mathematicae, Tome 13 (1975) pp. 232-241. http://gdmltest.u-ga.fr/item/GDZPPN002028719/