@article{IZKAB_2013_4_a2,
     author = {D. Y. Zaporozhets and A. Y. Kudaev and A. A. Lezhebokov},
     title = {Multi-level algorithms for solving problems},
     journal = {News of the Kabardin-Balkar scientific center of RAS},
     pages = {21--28},
     year = {2013},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IZKAB_2013_4_a2/}
}