@article{CTGDC_2004__45_2_82_0, author = {Lawson, Mark V. and Steinberg, Benjamin}, title = {Ordered groupoids and \'etendues}, journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques}, volume = {45}, year = {2004}, pages = {82-108}, mrnumber = {2072933}, zbl = {1060.18002}, language = {en}, url = {http://dml.mathdoc.fr/item/CTGDC_2004__45_2_82_0} }
Lawson, Mark V.; Steinberg, Benjamin. Ordered groupoids and étendues. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 45 (2004) pp. 82-108. http://gdmltest.u-ga.fr/item/CTGDC_2004__45_2_82_0/
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