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@article{AIHPA_1976__24_1_31_0, author = {Voros, A.}, title = {Semi-classical approximations}, journal = {Annales de l'I.H.P. Physique th\'eorique}, pages = {31--90}, publisher = {Gauthier-Villars}, volume = {24}, number = {1}, year = {1976}, mrnumber = {420747}, language = {en}, url = {http://geodesic.mathdoc.fr/item/AIHPA_1976__24_1_31_0/} }
Voros, A. Semi-classical approximations. Annales de l'I.H.P. Physique théorique, Tome 24 (1976) no. 1, pp. 31-90. http://geodesic.mathdoc.fr/item/AIHPA_1976__24_1_31_0/