@article{1178243383,
author = {Istr\u a\c tescu, Vasile and Sait\^o, Teishir\^o and Yoshino, Takashi},
title = {On a class of operators},
journal = {Tohoku Math. J. (2)},
volume = {18},
number = {4},
year = {1966},
pages = { 410-413},
language = {en},
url = {http://dml.mathdoc.fr/item/1178243383}
}
Istrăţescu, Vasile; Saitô, Teishirô; Yoshino, Takashi. On a class of operators. Tohoku Math. J. (2), Tome 18 (1966) no. 4, pp. 410-413. http://gdmltest.u-ga.fr/item/1178243383/