@article{DAN_1969_189_4_a7,
     author = {L. S. Pontryagin and E. F. Mishchenko},
     title = {The problem of the escape of one controlled object from another},
     journal = {Doklady Akademii Nauk},
     pages = {721--723},
     publisher = {mathdoc},
     volume = {189},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_189_4_a7/}
}