@article{IIGUM_2012_5_3_a3,
     author = {E. D. Kotina},
     title = {On convergence of block iterative methods},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {41--55},
     year = {2012},
     volume = {5},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2012_5_3_a3/}
}