@article{1261154046, author = {KATO, Tosio}, title = {On finite-dimensional perturbations of self-adjoint operators.}, journal = {J. Math. Soc. Japan}, volume = {9}, number = {4}, year = {1957}, pages = { 239-249}, language = {en}, url = {http://dml.mathdoc.fr/item/1261154046} }
KATO, Tosio. On finite-dimensional perturbations of self-adjoint operators.. J. Math. Soc. Japan, Tome 9 (1957) no. 4, pp. 239-249. http://gdmltest.u-ga.fr/item/1261154046/