@article{1250130560, author = {Landis, Dale and Morse, Marston}, title = {Tractions in critical point theory}, journal = {Rocky Mountain J. Math.}, volume = {5}, number = {4}, year = {1975}, pages = { 379-400}, language = {en}, url = {http://dml.mathdoc.fr/item/1250130560} }
Landis, Dale; Morse, Marston. Tractions in critical point theory. Rocky Mountain J. Math., Tome 5 (1975) no. 4, pp. 379-400. http://gdmltest.u-ga.fr/item/1250130560/