@article{GDZPPN002309416, title = {Holomorphic Relative Inverses of Operator Valued Functions.}, journal = {Mathematische Annalen}, volume = {212}, year = {1974}, pages = {179-194}, zbl = {0265.47028}, url = {http://dml.mathdoc.fr/item/GDZPPN002309416} }
Bart, Harm. Holomorphic Relative Inverses of Operator Valued Functions.. Mathematische Annalen, Tome 212 (1974) pp. 179-194. http://gdmltest.u-ga.fr/item/GDZPPN002309416/