TY - RPRT TI - Visible quantum cutting in LiGdF4:Eu3+ through downconversion AU - RT Wegh AU - H Donker AU - KD Oskam AU - A Meijerink PY - 1999 DO - 10.1126/science.283.5402.663 UR - https://pubmed.ncbi.nlm.nih.gov/9924020/ ID - 9924020 ER -