@article{DE_1992_28_11_a17,
     author = {E. N. Khailov},
     title = {Determination of the switching times of an extremal control in a nonlinear time-optimality problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1988--1993},
     publisher = {mathdoc},
     volume = {28},
     number = {11},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_11_a17/}
}