Luong, T.T., Cuong, N.N. and Dung, L.T. 2016. The preservation of good cryptographyic properties of MDS matrix under direct exponent transformation. Journal of Computer Science and Cybernetics. 31, 4 (Jan. 2016), 291. DOI:https://doi.org/10.15625/1813-9663/31/4/7059.