Media type: E-Article Title: Cooperative luminescence in Yb3 -doped phosphate glasses Contributor: Bell, M J V; Quirino, W G; Oliveira, S L; Sousa, D F de; Nunes, L A O Published: IOP Publishing, 2003 Published in: Journal of Physics: Condensed Matter, 15 (2003) 27, Seite 4877-4887 Language: Not determined DOI: 10.1088/0953-8984/15/27/319 ISSN: 0953-8984; 1361-648X Keywords: Condensed Matter Physics ; General Materials Science Origination: Footnote: