@article{DE_1985_21_8_a4,
     author = {V. F. Dem'yanov and V. N. Nikulina and I. R. Shablinskaya},
     title = {A problem of optimal control with nonsmooth differential constraints},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1324--1330},
     publisher = {mathdoc},
     volume = {21},
     number = {8},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_8_a4/}
}