中国科学院数学与系统科学研究院期刊网
Backward Perturbation Analysis for the Matrix Equation ATXA + BTY B = D
Xing-dong Yang, Xiu-hong Feng, Qing-quan He
Acta Mathematicae Applicatae Sinica(English Series) . 2011, (2): 281 -288 .  DOI: 10.1007/s10255-011-0055-0