# Upconversion processes in Erᶾ⁺-doped K₂YF₅ crystals

> 1998 master's thesis by Timothy Dean at University of Canterbury

**Wikidata**: [Q112851126](https://www.wikidata.org/wiki/Q112851126)  
**Source**: https://4ort.xyz/entity/upconversion-processes-in-er-doped-k-yf-crystals