@article{701416,
     title = {Pradines-type groupoids},
     booktitle = {Proceedings of the Winter School "Geometry and Physics"},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {1987},
     pages = {[125]-143},
     mrnumber = {MR0946719},
     zbl = {0642.58005},
     url = {http://dml.mathdoc.fr/item/701416}
}

Kubarski, Jan. Pradines-type groupoids, dans Proceedings of the Winter School "Geometry and Physics", GDML_Books,  (1987), pp. [125]-143. http://gdmltest.u-ga.fr/item/701416/