@article{MASLO_1961_11_1_a3,
     author = {Bos\'ak, Juraj},
     title = {B-pologrupy},
     journal = {Mathematica slovaca},
     pages = {32--44},
     year = {1961},
     volume = {11},
     number = {1},
     zbl = {0214.03701},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1961_11_1_a3/}
}