@article{IIGUM_2017_19_a4,
     author = {I. V. Rasina},
     title = {Discrete nonuniform systems and sufficient conditions of optimality},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {62--74},
     publisher = {mathdoc},
     volume = {19},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2017_19_a4/}
}