@article{3319, author = {Polonijo, M.}, title = {Transitive groupoids}, journal = {Portugaliae mathematica}, volume = {50}, year = {1993}, pages = {63-74}, zbl = {0799.20065}, mrnumber = {1300586}, language = {en}, url = {http://dml.mathdoc.fr/item/3319} }
Polonijo, M. Transitive groupoids. Portugaliae mathematica, Tome 50 (1993) pp. 63-74. http://gdmltest.u-ga.fr/item/3319/