Huy, N.V., Mai, L.C., Thang, V.T. and Truong, D.Q. 2014. Vietnamese recognition using tonal phoneme based on multi space distribution. Journal of Computer Science and Cybernetics. 30, 1 (May 2014), 28–38. DOI:https://doi.org/10.15625/1813-9663/30/1/3553.