@article{AIF_2004__54_5_1393_0,
     author = {Aoki, Takashi and Kawai, Takahiro and Koike, Tatsuya and Takei, Yoshitsugu},
     title = {On the exact {WKB} analysis of microdifferential operators of {WKB} type},
     journal = {Annales de l'Institut Fourier},
     pages = {1393--1421},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {54},
     number = {5},
     year = {2004},
     doi = {10.5802/aif.2053},
     mrnumber = {2127852},
     zbl = {1079.34070},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/aif.2053/}
}