@article{DE_1989_25_11_a27,
     author = {V. E. Pak and A. G. Chentsov},
     title = {Some topological properties of generalized solutions of nonlinear control systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2004--2005},
     publisher = {mathdoc},
     volume = {25},
     number = {11},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_11_a27/}
}