@article{DE_1998_34_10_a5,
     author = {A. V. Plotnikov},
     title = {Controlled quasi-differential equations and some of their properties},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1332--1336},
     publisher = {mathdoc},
     volume = {34},
     number = {10},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_10_a5/}
}