@article{DE_1969_5_3_a2,
     author = {E. H. Al'brekht},
     title = {The optimal control of the motion of quasilinear systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {430--442},
     publisher = {mathdoc},
     volume = {5},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_3_a2/}
}