@article{RCP25_1989__40__1_0,
     author = {Helffer, B. and Sj\"ostrand, J.},
     title = {Analyse semiclassique pour l'\'equation de {Harper}},
     journal = {Les rencontres physiciens-math\'ematiciens de Strasbourg -RCP25},
     note = {talk:1},
     pages = {1--18},
     publisher = {Institut de Recherche Math\'ematique Avanc\'ee - Universit\'e Louis Pasteur},
     volume = {40},
     year = {1989},
     language = {fr},
     url = {http://www.numdam.org/item/RCP25_1989__40__1_0/}
}