@article{DE_1975_11_4_a15,
     author = {S. F. Morozov and V. I. Sumin},
     title = {Time-optimality problems in the theory of the optimal control of transfer processes},
     journal = {Differencialʹnye uravneni\^a},
     pages = {727--740},
     publisher = {mathdoc},
     volume = {11},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_4_a15/}
}