Boichuk, V., R. Leshko, and D. Karpyn. “The Effect of Shallow Impurities on the Light Absorption by the Nanocrystals CdS”. Ukrainian Journal of Physics 63, no. 12 (December 9, 2018): 1088. Accessed July 3, 2020. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018099.