@article{SMJ_1938-1939__6__A4_0,
     author = {Fortet, R.},
     title = {Les probl\`emes isop\'erim\'etriques},
     journal = {S\'eminaire de Math\'ematiques dit de Julia},
     note = {talk:4},
     pages = {1--26},
     publisher = {\'Ecole Normale Sup\'erieure},
     volume = {6},
     year = {1938-1939},
     language = {fr},
     url = {http://www.numdam.org/item/SMJ_1938-1939__6__A4_0/}
}