中国科学院数学与系统科学研究院期刊网
The Best Equivariant Estimator of the Parameters in a Conditional Independent Normal Distribution with Missing Data
Kai XU, Dao Jiang HE
Acta Mathematica Sinica, Chinese Series . 2016, (6): 783 -794 .  DOI: 10.12386/A2016sxxb0070