Phat, Tran Huu, Le Viet Hoa, and Dang Thi Minh Hue. “Phase Structure of Bose - Einstein Condensate in Ultra - Cold Bose Gases”. Communications in Physics 24, no. 4 (March 13, 2015): 343. Accessed April 25, 2024. https://vjs.ac.vn/index.php/cip/article/view/5041.