%0 Journal Article %A Bača, Martin %T On magic labellings of type $(1,1,1)$ for three classes of plane graphs %J Mathematica slovaca %D 1989 %P 233-239 %V 39 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1989__39_3_a1/ %G en %F MASLO_1989__39_3_a1