@article{DE_1987_23_5_a5,
     author = {N. A. Izobov and R. A. Prokhorova},
     title = {On a problem of {R.} {Conti}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {775--791},
     publisher = {mathdoc},
     volume = {23},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_5_a5/}
}