@article{AIHPA_1991__54_4_435_0,
     author = {Accardi, L. and Lu, Y. G.},
     title = {The weak coupling limit without rotating wave approximation},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {435--458},
     publisher = {Gauthier-Villars},
     volume = {54},
     number = {4},
     year = {1991},
     mrnumber = {1128865},
     zbl = {0734.60105},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1991__54_4_435_0/}
}