@article {Most1967,
title = {Most Efficient Least Squares Estimator in Multivariate Regression (revised)},
year = {1967},
url = {https://www.esri.ie/publications/most-efficient-least-squares-estimator-in-multivariate-regression-revised},
author = {Geary, Roy C},
journal = {Memorandum Series 42},
}