@article{PORMA_1970__29_2_115115,
     author = {Chew, James},
     title = {Topological groupoids whose elements have },
     journal = {Portugaliae mathematica},
     pages = {113--118},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {1970},
     mrnumber = {0285657},
     zbl = {0216.34204},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1970__29_2_115115/}
}