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@article{IVM_1978_5_a12, author = {I. I. Ryabcev}, title = {Operational calculus in terms of perfect operators}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {103--113}, publisher = {mathdoc}, number = {5}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1978_5_a12/} }
I. I. Ryabcev. Operational calculus in terms of perfect operators. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1978), pp. 103-113. http://geodesic.mathdoc.fr/item/IVM_1978_5_a12/