K. Michael Boon Chong, T. Sin Yin, C. Sze Keong, and F. Ting Fung, “A Comparison on the MRL Performances of Optimal MEWMA and Optimal MCUSUM Control Charts”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 1, no. 1, pp. 31–35, Feb. 2011.