no. 2
Constructing ordered groupoids
Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 46 (2005) no. 2, pp. 123-138. 
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     title = {Constructing ordered groupoids},
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     volume = {46},
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     url = {http://www.numdam.org/item/CTGDC_2005__46_2_123_0/}
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Lawson, Mark V. Constructing ordered groupoids. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 46 (2005) no. 2, pp. 123-138. http://www.numdam.org/item/CTGDC_2005__46_2_123_0/

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