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@article{MZM_1987_41_1_a7, author = {M. S. Nikol'skii}, title = {Approximation of the attainability set for a controlled process}, journal = {Matemati\v{c}eskie zametki}, pages = {71--76}, publisher = {mathdoc}, volume = {41}, number = {1}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1987_41_1_a7/} }
M. S. Nikol'skii. Approximation of the attainability set for a controlled process. Matematičeskie zametki, Tome 41 (1987) no. 1, pp. 71-76. http://geodesic.mathdoc.fr/item/MZM_1987_41_1_a7/