Dinh Khang, Pham, Duy Dat, Vo, Phuc Toan, Dang, AND Van Tuan, Vu. " First Principles Study on Electronic and Optical Properties of Quinary Copper-based Sulfides and Selenides Cu2HgGe(S1-xSex)4" VNU Journal of Science: Mathematics - Physics [Online], Volume 37 Number 1 (12 March 2021)