@article{DE_1968_4_5_a3,
     author = {Yu. P. Krivenkov},
     title = {The use of the theory of optimal processes for the investigation of production {models.~II}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {798--811},
     year = {1968},
     volume = {4},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_5_a3/}
}