@article{SJIM_2006_9_4_a8,
     author = {M. M. Lavrent'ev and L. Ja. Savel'ev and S. V. Balakin},
     title = {Matrix operator equations},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {105--124},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2006_9_4_a8/}
}