Media type: E-Article Title: Finite Groups, Spherical 2-Categories, and 4-Manifold Invariants Contributor: Mackaay, Marco Published: Elsevier BV, 2000 Published in: Advances in Mathematics, 153 (2000) 2, Seite 353-390 Language: English DOI: 10.1006/aima.1999.1909 ISSN: 0001-8708 Keywords: General Mathematics Origination: Footnote: Access State: Open Access