@article{DE_1969_5_4_a6,
     author = {R. Gabasov and S. V. Churakova},
     title = {On the theory of optimal processes in linear systems with lag},
     journal = {Differencialʹnye uravneni\^a},
     pages = {662--677},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_4_a6/}
}