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@article{DAN_1989_308_3_a5, author = {I. A. Shevchuk}, title = {On co-approximation of monotone functions}, journal = {Doklady Akademii Nauk}, pages = {537--541}, publisher = {mathdoc}, volume = {308}, number = {3}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_3_a5/} }
I. A. Shevchuk. On co-approximation of monotone functions. Doklady Akademii Nauk, Tome 308 (1989) no. 3, pp. 537-541. http://geodesic.mathdoc.fr/item/DAN_1989_308_3_a5/