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@article{DE_1972_8_11_a1, author = {V. G. Boltyanskii}, title = {Discrete maximum principle (method of local sections)}, journal = {Differencialʹnye uravneni\^a}, pages = {1927--1935}, publisher = {mathdoc}, volume = {8}, number = {11}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_11_a1/} }
V. G. Boltyanskii. Discrete maximum principle (method of local sections). Differencialʹnye uravneniâ, Tome 8 (1972) no. 11, pp. 1927-1935. http://geodesic.mathdoc.fr/item/DE_1972_8_11_a1/