Media type: E-Article Title: Descent for Regular Epimorphisms in Barr Exact Goursat Categories Contributor: Janelidze, George; Sobral, Manuela Published: Springer Science and Business Media LLC, 2011 Published in: Applied Categorical Structures, 19 (2011) 1, Seite 271-276 Language: English DOI: 10.1007/s10485-009-9199-y ISSN: 0927-2852; 1572-9095 Origination: Footnote: