@article{ASNSP_1982_4_9_1_57_0,
     author = {Stormark, Olle},
     title = {On the theorem of {Frobenius} for complex vector fields},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {57--90},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 9},
     number = {1},
     year = {1982},
     mrnumber = {664103},
     zbl = {0509.35057},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1982_4_9_1_57_0/}
}