Nonsingularity on Level-2(r1, r2)-circulant Matrices of Type (m,n)
江兆林, 郭运端
Nonsingularity on Level-2(r1, r2)-circulant Matrices of Type (m,n)
Jiang Zhaolin, Guo Yunrui
数学季刊 . 1996, (2): 106 -110 .