@article{DE_1975_11_8_a13,
     author = {H. Sh. Pham},
     title = {The support principle in discrete processes},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1485--1496},
     year = {1975},
     volume = {11},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_8_a13/}
}