@article{1177706197, author = {Balakrishnan, A. V.}, title = {On a Characterization of Covariances}, journal = {Ann. Math. Statist.}, volume = {30}, number = {4}, year = {1959}, pages = { 670-675}, language = {en}, url = {http://dml.mathdoc.fr/item/1177706197} }
Balakrishnan, A. V. On a Characterization of Covariances. Ann. Math. Statist., Tome 30 (1959) no. 4, pp. 670-675. http://gdmltest.u-ga.fr/item/1177706197/