Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1999_66_5_a3, author = {T. V. Karataeva and V. D. Koshmanenko}, title = {Generalized sum of operators}, journal = {Matemati\v{c}eskie zametki}, pages = {671--681}, publisher = {mathdoc}, volume = {66}, number = {5}, year = {1999}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1999_66_5_a3/} }
T. V. Karataeva; V. D. Koshmanenko. Generalized sum of operators. Matematičeskie zametki, Tome 66 (1999) no. 5, pp. 671-681. http://geodesic.mathdoc.fr/item/MZM_1999_66_5_a3/