Media type: E-Article Title: Luminescence upconversion mechanisms in Yb3+–Tb3+ systems Contributor: Salley, G.M.; Valiente, R.; Guedel, H.U. Published: Elsevier BV, 2001 Published in: Journal of Luminescence, 94-95 (2001), Seite 305-309 Language: English DOI: 10.1016/s0022-2313(01)00310-6 ISSN: 0022-2313 Origination: Footnote: