The Research for Color Image Encoding Based on 4-D n Order Orthogonal Matrix. - Sang Aijun; Hexin Chen; Feng Hua; Deng Linlin (CSSE (2), 2008)

Research on the Algorithm of Multidimensional Vector Fourier Transformation Matrix. - Yue Yang; Aijun Sang; Liyue Sun; Xiaoni Li; Hexin Chen (IGTA, 2015)