@article{AIHPA_1985__42_2_127_0,
     author = {Helffer, B. and Sj\"ostrand, J.},
     title = {Puits multiples en limite semi-classique. {II.} {Interaction} mol\'eculaire. {Sym\'etries.} {Perturbation}},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {127--212},
     publisher = {Gauthier-Villars},
     volume = {42},
     number = {2},
     year = {1985},
     mrnumber = {798695},
     zbl = {0595.35031},
     language = {fr},
     url = {http://archive.numdam.org/item/AIHPA_1985__42_2_127_0/}
}