Vu Hoa, Binh, Long Hoang Ngoc, and Tho Vu Quang. “INFLATION AND AXION DARK MATTER IN THE 3-3-1 MODEL”. SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY 9, no. 1 (March 13, 2023). Accessed May 7, 2024. https://tckh.daihoctantrao.edu.vn/index.php/sjttu/article/view/877.