Ken, T. L., T. B. Ahmad, L. K. Quen, G. Y. Siang, T. W. Yen, and W. W. Kit. “Topological Basis of Flat Electroencephalography’s State Space”. Asian Journal of Engineering and Technology, vol. 5, no. 2, Apr. 2017, doi:10.24203/ajet.v5i2.4756.