Wheyming Tina Song, Bruce W. Schmeiser. Variance of the Sample Mean: Properties and Graphs of Quadratic-Form Estimators. Operations Research, 41(3):501-517, 1993. [doi]
@article{SongS93-0,
title = {Variance of the Sample Mean: Properties and Graphs of Quadratic-Form Estimators},
author = {Wheyming Tina Song and Bruce W. Schmeiser},
year = {1993},
doi = {10.1287/opre.41.3.501},
url = {http://dx.doi.org/10.1287/opre.41.3.501},
researchr = {https://researchr.org/publication/SongS93-0},
cites = {0},
citedby = {0},
journal = {Operations Research},
volume = {41},
number = {3},
pages = {501-517},
}