Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1972_11_a12, author = {S. R. Firshtein}, title = {Normal solvability of integro-differential equations}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {90--97}, publisher = {mathdoc}, number = {11}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1972_11_a12/} }
S. R. Firshtein. Normal solvability of integro-differential equations. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1972), pp. 90-97. http://geodesic.mathdoc.fr/item/IVM_1972_11_a12/