Media type: E-Article Title: Lifting smooth homotopies of orbit spaces Contributor: Schwarz, Gerald W. imprint: Springer Science and Business Media LLC, 1980 Published in: Publications mathématiques de l'IHÉS, 51 (1980) 1, Seite 37-132 Language: English DOI: 10.1007/bf02684776 ISSN: 0073-8301; 1618-1913 Origination: Footnote: Access State: Open Access