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Morphisms of 2-groupoids and low-dimensional cohomology of crossed modules

Bibliographic reference Duskin, J. ; Kieboom, R. ; Vitale, Enrico. Morphisms of 2-groupoids and low-dimensional cohomology of crossed modules. In: Fiels Institute Communication Series, Vol. 43, p. 227-241
Permanent URL http://hdl.handle.net/2078.1/73973