@article{DE_1997_33_8_a14,
     author = {S. Ya. Serovaǐskiǐ},
     title = {Optimal control of a nonlinear singular system with a fixed terminal state},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1114--1117},
     publisher = {mathdoc},
     volume = {33},
     number = {8},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_8_a14/}
}