@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/