@article{SMJ_1938-1939__6__A3_0,
     author = {Pisot, Charles},
     title = {M\'ethodes directes du calcul des variations},
     journal = {S\'eminaire de Math\'ematiques dit de Julia},
     note = {talk:3},
     pages = {1--18},
     publisher = {\'Ecole Normale Sup\'erieure},
     volume = {6},
     year = {1938-1939},
     language = {fr},
     url = {http://www.numdam.org/item/SMJ_1938-1939__6__A3_0/}
}