@article{1183538346, author = {Le Quang Chu}, title = {Duality and Kato's theorem on small perturbations}, journal = {Bull. Amer. Math. Soc.}, volume = {82}, number = {3}, year = {1976}, pages = { 896-898}, language = {en}, url = {http://dml.mathdoc.fr/item/1183538346} }
Le Quang Chu. Duality and Kato's theorem on small perturbations. Bull. Amer. Math. Soc., Tome 82 (1976) no. 3, pp. 896-898. http://gdmltest.u-ga.fr/item/1183538346/