@article{DE_1990_26_10_a24,
     author = {E. P. Sobolevskii},
     title = {Systems of differential and algebraic inequalities connected with a control problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1826--1828},
     publisher = {mathdoc},
     volume = {26},
     number = {10},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_10_a24/}
}