@article{CTGDC_1991__32_2_145_0,
     author = {Kock, Anders and Moerdijk, Ieke},
     title = {Presentations of \'etendues},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {145--164},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {32},
     number = {2},
     year = {1991},
     mrnumber = {1142688},
     zbl = {0745.18001},
     language = {en},
     url = {http://archive.numdam.org/item/CTGDC_1991__32_2_145_0/}
}