@article{SEDP_1986-1987____A16_0,
     author = {Helffer, B. and Sj\"ostrand, J.},
     title = {Analyse semi-classique pour l'\'equation de {Harper}},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:17},
     pages = {1--12},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1986-1987},
     zbl = {0634.35056},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1986-1987____A16_0/}
}