@inbook{401557, title = {18. Remarkable kinds of groupoids}, booktitle = {Foundations of the Theory of Groupoids and Groups}, series = {GDML\_Books}, publisher = {VEB Deutscher Verlag der Wissenschaften}, address = {Berlin}, year = {1974}, pages = {131-145}, url = {http://dml.mathdoc.fr/item/401557} }
(éd.). 18. Remarkable kinds of groupoids, dans Foundations of the Theory of Groupoids and Groups, GDML_Books, (1974), pp. 131-145. http://gdmltest.u-ga.fr/item/401557/