Photoluminescence associated with quantum dots in cubic GaN/InGaN/GaN double heterostructures - Husberg, O; Khartchenko, A; Vogelsang, H; As, D J; Lischka, K; Noriega, Odille Cue; Tabata, Americo; Scolfaro, Luisa Maria Ribeiro; Leite, J. R. (Physica E, 2002)