姚美荣,伍俊良,薛兰兰.矩阵展形和矩阵秩的注记[J].重庆工商大学学报(自然科学版),2012,29(8):8-10
YAO Mei-rong, WU Jun-liang, XUE Lan-lan. A Note on Estimation for the Spread and the Rank of Matrices[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2012,29(8):8-10