@article{TIMM_2013_19_1_a26,
     author = {V. N. Ushakov and A. R. Matviichuk and A. V. Ushakov and G. V. Parshikov},
     title = {The invariance of sets in the construction of solutions to a~problem of approach at a~fixed time},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {264--283},
     year = {2013},
     volume = {19},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2013_19_1_a26/}
}