@article{DAN_1968_183_2_a13,
     author = {R. Gabasov},
     title = {On the theory of necessary optimality conditions governing special controls},
     journal = {Doklady Akademii Nauk},
     pages = {300--302},
     publisher = {mathdoc},
     volume = {183},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_183_2_a13/}
}