@article{IIGUM_2017_19_a13,
     author = {S. P. Sorokin},
     title = {Estimates of reachable set and sufficient optimality condition for discrete control problems},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {178--183},
     year = {2017},
     volume = {19},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2017_19_a13/}
}