@article{CMJ_2005__55_2_a5,
     author = {Ohriska, J\'an},
     title = {Problems with one quarter},
     journal = {Czechoslovak Mathematical Journal},
     pages = {349--363},
     publisher = {mathdoc},
     volume = {55},
     number = {2},
     year = {2005},
     mrnumber = {2137142},
     zbl = {1081.34033},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2005__55_2_a5/}
}