@article{MZM_1972_11_5_a9,
     author = {G. P. Astrakhantsev},
     title = {Selection of relaxation parameter},
     journal = {Matemati\v{c}eskie zametki},
     pages = {555--558},
     year = {1972},
     volume = {11},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_11_5_a9/}
}