@article{IVM_1993_12_a9,
     author = {I. V. Konnov},
     title = {On the rate of convergence of combined relaxation methods},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {89--92},
     publisher = {mathdoc},
     number = {12},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1993_12_a9/}
}