Le Thi Minh Phuong; Nguyen Bao Hoang Thanh*. 2017. “Establishing Cooperative Competency for High- School Students by Using Experimens in Teaching Geometrical Optics- General Physics 11”. The University of Danang - Journal of Science and Technology 8 (117):11-14. https://jst-ud.vn/jst-ud/article/view/3591.