@article{DA_1979_18_a7,
     author = {V. A. Shpak},
     title = {Generalized indicators in control problems},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {68--75},
     year = {1979},
     number = {18},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_1979_18_a7/}
}