@article{DE_1973_9_2_a9,
     author = {V. S. Tonkova and E. L. Tonkov},
     title = {Certain properties of averaged solutions of a control system with a discontinuous nonlinearity},
     journal = {Differencialʹnye uravneni\^a},
     pages = {278--289},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_2_a9/}
}