中国科学院数学与系统科学研究院期刊网
ON THE EXISTENCE AND UNIQUENESS OF LDLT DECOMPOSITION OF REAL SYMMETRIC NONNEGATIVE DEFINITE MATRICES AND RELATED PROBLEMS
Zhu Ci-you
Acta Mathematicae Applicatae Sinica . 1984, (2): 196 -203 .  DOI: 10.12387/C1984024