@article{1077491904,
author = {Mancill, J. D.},
title = {The Jacobi condition for unilateral variations},
journal = {Duke Math. J.},
volume = {6},
number = {1},
year = {1940},
pages = { 341-344},
language = {en},
url = {http://dml.mathdoc.fr/item/1077491904}
}
Mancill, J. D. The Jacobi condition for unilateral variations. Duke Math. J., Tome 6 (1940) no. 1, pp. 341-344. http://gdmltest.u-ga.fr/item/1077491904/