Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1971_3_a11, author = {V. Ya. Stam}, title = {A~certain class of operators in abstract spaces}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {86--91}, publisher = {mathdoc}, number = {3}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1971_3_a11/} }
V. Ya. Stam. A~certain class of operators in abstract spaces. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1971), pp. 86-91. http://geodesic.mathdoc.fr/item/IVM_1971_3_a11/