The stack quotient of a groupoid
Cahiers de Topologie et Géométrie Différentielle Catégoriques, Volume 44 (2003) no. 2, p. 85-104 
@article{CTGDC_2003__44_2_85_0,
     author = {Kock, Anders},
     title = {The stack quotient of a groupoid},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {44},
     number = {2},
     year = {2003},
     pages = {85-104},
     zbl = {1092.14001},
     mrnumber = {1985833},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_2003__44_2_85_0}
}

Kock, Anders. The stack quotient of a groupoid. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Volume 44 (2003) no. 2, pp. 85-104. http://www.numdam.org/item/CTGDC_2003__44_2_85_0/

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