@article{DE_2001_37_9_a1,
     author = {L. F. Zelikina and M. I. Zelikin and K. V. Khlyustov},
     title = {Singular {Stratified} {Manifolds} of {Involutive} {Controlled} {Systems}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1161--1167},
     publisher = {mathdoc},
     volume = {37},
     number = {9},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2001_37_9_a1/}
}