@article{ZVMMF_2005_45_4_a3,
     author = {L. V. Spesivtsev and V. N. Ushakov},
     title = {Approximate computation of the invariance kernel of differential inclusions},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {592--602},
     year = {2005},
     volume = {45},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2005_45_4_a3/}
}