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@article{IVM_1970_8_a15, author = {M. I. Khaikin}, title = {The regularization of operators with a~nonclosed range of values}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {118--123}, publisher = {mathdoc}, number = {8}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1970_8_a15/} }
M. I. Khaikin. The regularization of operators with a~nonclosed range of values. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (1970), pp. 118-123. http://geodesic.mathdoc.fr/item/IVM_1970_8_a15/