@incollection{AST_2003__284__181_0,
     author = {Melin, Anders and Sj\"ostrand, Johannes},
     title = {Bohr-Sommerfeld quantization condition for non-selfadjoint operators in dimension $2$},
     booktitle = {Autour de l'analyse microlocale - Volume en l'honneur de Jean-Michel Bony},
     editor = {Lebeau Gilles},
     series = {Ast\'erisque},
     pages = {181--244},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {284},
     year = {2003},
     zbl = {1061.35186},
     language = {en},
     url = {http://archive.numdam.org/item/AST_2003__284__181_0/}
}