Media type: E-Article Title: Classifying spaces for sheaves of simplicial groupoids Contributor: Joyal, André; Tierney, Myles imprint: Elsevier BV, 1993 Published in: Journal of Pure and Applied Algebra Language: English DOI: 10.1016/0022-4049(93)90091-7 ISSN: 0022-4049 Keywords: Algebra and Number Theory Origination: Footnote: Access State: Open Access