@article{SEDP_1981-1982____A10_0,
     author = {B\'erard, P.},
     title = {In\'egalit\'es isop\'erim\'etriques et applications. {Domaines} nodaux des fonctions propres},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:11},
     pages = {1--9},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1981-1982},
     mrnumber = {671608},
     zbl = {0489.35058},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1981-1982____A10_0/}
}