Long, Hoang Ngoc, Lam Phu An Huy, Tran Thanh Thuy, Ly Thi Tu Tran, and Vu Thi Hoang Yen. “Gauge Bosons in the 3-3-1 Model With Three Neutrino Singlets”. Communications in Physics 25, no. 3 (December 31, 2015): 227. Accessed October 21, 2021. https://vjs.ac.vn/index.php/cip/article/view/6068.