@article{DE_1973_9_4_a19,
     author = {K. K. Gasanov},
     title = {The maximum principle for processes with distributed parameters and retarded arguments},
     journal = {Differencialʹnye uravneni\^a},
     pages = {743--746},
     year = {1973},
     volume = {9},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_4_a19/}
}