@article{10_21136_CPM_1955_117147,
     author = {Kudl\'a\v{c}ek, V\'aclav},
     title = {O svazov\v{e} uspo\v{r}\'adan\'ych grupoidech},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {44--50},
     year = {1955},
     volume = {80},
     number = {1},
     doi = {10.21136/CPM.1955.117147},
     mrnumber = {0078341},
     zbl = {0068.25802},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1955.117147/}
}