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@article{DAN_1973_210_4_a8, author = {M. M. Simkin}, title = {Criterium of proximity of impulse- and continuous systems}, journal = {Doklady Akademii Nauk}, pages = {783--786}, publisher = {mathdoc}, volume = {210}, number = {4}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1973_210_4_a8/} }
M. M. Simkin. Criterium of proximity of impulse- and continuous systems. Doklady Akademii Nauk, Tome 210 (1973) no. 4, pp. 783-786. http://geodesic.mathdoc.fr/item/DAN_1973_210_4_a8/