@article{MASLO_1955_5_1_a1,
     author = {\v{S}ulka, Robert},
     title = {Topologick\'e grupoidy},
     journal = {Mathematica slovaca},
     pages = {10--21},
     year = {1955},
     volume = {5},
     number = {1},
     mrnumber = {0069189},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1955_5_1_a1/}
}