@article{SEDP_1988-1989____A12_0,
     author = {Helffer, B. and Sj\"ostrand, J.},
     title = {Op\'erateurs de {Schr\"odinger} avec champs magn\'etiques faibles et constants},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:12},
     pages = {1--11},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1988-1989},
     mrnumber = {1032288},
     zbl = {0702.35185},
     language = {fr},
     url = {http://archive.numdam.org/item/SEDP_1988-1989____A12_0/}
}