@article{00885485, title = {Criteria of unitary equivalence of Hermitian operators with a degenerate spectrum.}, journal = {Georgian Mathematical Journal}, volume = {3}, year = {1996}, pages = {141-152}, doi = {10.1007/BF02254737}, zbl = {0849.15006}, language = {en}, url = {http://dml.mathdoc.fr/item/00885485} }
Lomidze, I. Criteria of unitary equivalence of Hermitian operators with a degenerate spectrum.. Georgian Mathematical Journal, Tome 3 (1996) pp. 141-152. doi : 10.1007/BF02254737. http://gdmltest.u-ga.fr/item/00885485/