@article{IIGUM_2011_4_3_a12,
     author = {S. P. Sorokin},
     title = {Monotone {Lyapunov} type functions and global optimality conditions for discrete control problems},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {132--145},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2011_4_3_a12/}
}