@article{MASLO_1980_30_2_a8,
     author = {\v{S}ipo\v{s}, J\'an},
     title = {On convergence groupoids},
     journal = {Mathematica slovaca},
     pages = {163--173},
     year = {1980},
     volume = {30},
     number = {2},
     mrnumber = {587242},
     zbl = {0441.20036},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1980_30_2_a8/}
}