@article{10_21136_AM_1988_104301,
     author = {Z{\'\i}tko, Jan},
     title = {Two step extrapolation and optimum choice of relaxation factor of the extrapolated {S.O.R.} method},
     journal = {Applications of Mathematics},
     pages = {177--196},
     publisher = {mathdoc},
     volume = {33},
     number = {3},
     year = {1988},
     doi = {10.21136/AM.1988.104301},
     mrnumber = {0944782},
     zbl = {0655.65058},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1988.104301/}
}