@article{10_21136_AM_2018_0314_17,
     author = {Tezaur, Radek and Van\v{e}k, Petr},
     title = {Improved convergence estimate for a multiply polynomially smoothed two-level method with an aggressive coarsening},
     journal = {Applications of Mathematics},
     pages = {629--641},
     publisher = {mathdoc},
     volume = {63},
     number = {6},
     year = {2018},
     doi = {10.21136/AM.2018.0314-17},
     mrnumber = {3893003},
     zbl = {07031680},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.2018.0314-17/}
}