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@article{DAN_1991_319_5_a4, author = {M. K. Bugir}, title = {A connection between the nonvariability of solutions and ill-posed}, journal = {Doklady Akademii Nauk}, pages = {1053--1056}, publisher = {mathdoc}, volume = {319}, number = {5}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1991_319_5_a4/} }
M. K. Bugir. A connection between the nonvariability of solutions and ill-posed. Doklady Akademii Nauk, Tome 319 (1991) no. 5, pp. 1053-1056. http://geodesic.mathdoc.fr/item/DAN_1991_319_5_a4/