TRAN , HUU PHAT, VAN THU NGUYEN, and VAN LONG NGUYEN. “PHASE STRUCTURE OF THE LINEAR SIGMA MODEL WITH ELECTRIC NEUTRALITY CONSTRAINT”. Nuclear Science and Technology 1, no. 4 (December 30, 2011): 22-32. Accessed May 4, 2024. http://jnst.vn/index.php/nst/article/view/316.