@article{SJIM_2007_10_4_a4,
     author = {V. P. Il'in and E. A. Itskovich},
     title = {Semi-conjugate direction methods with dynamic preconditioning},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {41--54},
     publisher = {mathdoc},
     volume = {10},
     number = {4},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2007_10_4_a4/}
}