@article{M2AN_1978__12_4_349_0,
     author = {Jouron, Claude},
     title = {Sur un probl\`eme d'optimisation ou la contrainte porte sur la fr\'equence fondamentale},
     journal = {RAIRO. Analyse num\'erique},
     pages = {349--375},
     publisher = {Centrale des revues, Dunod-Gauthier-Villars},
     address = {Montreuil},
     volume = {12},
     number = {4},
     year = {1978},
     mrnumber = {519018},
     zbl = {0402.73070},
     language = {fr},
     url = {http://archive.numdam.org/item/M2AN_1978__12_4_349_0/}
}