共 50 条
- [6] ADVANCES IN ESTIMATING COVARIANCE MATRICES [J]. JOURNAL OF INVESTMENT MANAGEMENT, 2021, 19 (03): : 60 - 80
- [7] Estimating the covariance of random matrices [J]. ELECTRONIC JOURNAL OF PROBABILITY, 2013, 18 : 1 - 26
- [10] ESTIMATING COVARIANCE MATRICES-II [J]. JOURNAL OF MULTIVARIATE ANALYSIS, 1991, 36 (02) : 163 - 174