@article{VMUMM_1990_6_a15,
     author = {I. O. Vashkov},
     title = {Time-optimality problems for distant targets},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {63--66},
     year = {1990},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1990_6_a15/}
}