TY - JOUR T1 - Optical Properties of Excited States in Solids JO - Journal of Modern Optics PY - 1994/01/01 AU - Fox AM ED - DO - DOI: 10.1080/09500349414550231 PB - Informa UK Limited VL - 41 IS - 1 SP - 168 EP - 168 Y2 - 2024/12/26 ER -