@article{ASNSP_1978_4_5_3_581_0,
     author = {Kawai, Takahiro},
     title = {Holomorphic perturbation of a system of micro-differential equations},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {581--586},
     year = {1978},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 5},
     number = {3},
     mrnumber = {501186},
     zbl = {0383.35050},
     language = {en},
     url = {https://www.numdam.org/item/ASNSP_1978_4_5_3_581_0/}
}