Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1971_3_a7, author = {I. I. Ogievetskii and A. I. Pidgaiko}, title = {Two-dimensional normal matrices}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {55--60}, publisher = {mathdoc}, number = {3}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1971_3_a7/} }
I. I. Ogievetskii; A. I. Pidgaiko. Two-dimensional normal matrices. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1971), pp. 55-60. http://geodesic.mathdoc.fr/item/IVM_1971_3_a7/