@article{DE_1971_7_9_a4,
     author = {R. Gabasov and M. L. Gusakova},
     title = {A maximum principle for general discrete systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1581--1590},
     publisher = {mathdoc},
     volume = {7},
     number = {9},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_9_a4/}
}