@article{CMUC_1966__7_4_a0,
     author = {Havel, V\'aclav},
     title = {One generalization of planar partitions of {Abelian} groups},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {419--427},
     publisher = {mathdoc},
     volume = {07},
     number = {4},
     year = {1966},
     mrnumber = {0212674},
     zbl = {0144.02102},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1966__7_4_a0/}
}