@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}, zbl = {0595.35031}, mrnumber = {798695}, language = {fr}, url = {http://www.numdam.org/item/AIHPA_1985__42_2_127_0/} }