@article{CTGDC_2004__45_1_23_0,
     author = {Kubarski, Jan and Rybicki, Tomasz},
     title = {Local and nice structures of the groupoid of an equivalence relation},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {23--34},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {45},
     number = {1},
     year = {2004},
     mrnumber = {2040661},
     zbl = {1061.58019},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_2004__45_1_23_0/}
}