@article{DE_1968_4_6_a0,
     author = {R. Gabasov and F. M. Kirillova},
     title = {The maximum principle for {L.} {S.} {Pontrjagin's} extremals},
     journal = {Differencialʹnye uravneni\^a},
     pages = {963--972},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_6_a0/}
}