@incollection{JEDP_1980____A5_0,
     author = {Helffer, Bernard and Robert, Didier},
     title = {Comportement semi-classique du spectre des {Hamiltoniens} quantiques elliptiques},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {5},
     pages = {1--5},
     publisher = {Ecole polytechnique},
     year = {1980},
     language = {fr},
     url = {http://www.numdam.org/item/JEDP_1980____A5_0/}
}