Ngoc Ha, Nguyen, Truong Kim Hieu, Nguyen Thanh Tung, and Le Hong Vu. “LOCK-IN-PHASE ANALYSIS OF N-GaAs PHOTOREFLECTANCE SPECTRA”. VNUHCM Journal of Science and Technology Development 8, no. 4 (April 30, 2005): 34-38. Accessed August 18, 2025. https://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/2988.