@article{DE_1991_27_5_a8,
     author = {A. V. Sarychev},
     title = {Optimality of generalized (impulse) controls in a nonlinear time-optimality problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {788--801},
     publisher = {mathdoc},
     volume = {27},
     number = {5},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_5_a8/}
}