@article{MASLO_2002_52_2_a7,
     author = {Kov\'a\v{c}ik, Ondrej},
     title = {Once more on the double {Fourier-Haar} series},
     journal = {Mathematica slovaca},
     pages = {215--220},
     year = {2002},
     volume = {52},
     number = {2},
     mrnumber = {1935119},
     zbl = {1007.42020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_2002_52_2_a7/}
}