@article{01234894, title = {On a class of covariance operators.}, journal = {Georgian Mathematical Journal}, volume = {5}, year = {1998}, pages = {415-424}, doi = {10.1023/B:GEOR.0000008113.19316.74}, zbl = {0916.60006}, language = {en}, url = {http://dml.mathdoc.fr/item/01234894} }
Chantladze, T.; Kandelaki, N. On a class of covariance operators.. Georgian Mathematical Journal, Tome 5 (1998) pp. 415-424. doi : 10.1023/B:GEOR.0000008113.19316.74. http://gdmltest.u-ga.fr/item/01234894/