[1]H.-H. Phan-Vu, V. T. Tran, V. N. Nguyen, H. V. Dang, and P. T. Do, “Neural Machine Translation between Vietnamese and English: an Empirical Study”, <i>J. Comput. Sci. Cybern.</i>, vol. 35, no. 2, p. 147–166, Jun. 2019.