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@article{IVM_1960_1_a3, author = {Yu. G. Borisovich}, title = {Stability of critical values of functionals}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {24--34}, publisher = {mathdoc}, number = {1}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1960_1_a3/} }
Yu. G. Borisovich. Stability of critical values of functionals. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1960), pp. 24-34. http://geodesic.mathdoc.fr/item/IVM_1960_1_a3/