Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1993_5_a4, author = {S. A. Gusarenko}, title = {A criterion for the reducibility of operator equations}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {43--45}, publisher = {mathdoc}, number = {5}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1993_5_a4/} }
S. A. Gusarenko. A criterion for the reducibility of operator equations. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1993), pp. 43-45. http://geodesic.mathdoc.fr/item/IVM_1993_5_a4/