@article{10_4064_cm107_2_8,
     author = {Istv\'an Blahota and Gy\"orgy G\'at and Ushangi Goginava},
     title = {Maximal operators of {Fej\'er} means of
 double {Vilenkin{\textendash}Fourier} series},
     journal = {Colloquium Mathematicum},
     pages = {287--296},
     publisher = {mathdoc},
     volume = {107},
     number = {2},
     year = {2007},
     doi = {10.4064/cm107-2-8},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm107-2-8/}
}