@article{article2909401d,
title   = {Improved heteroscedasticity-consistent covariance matrix estimators},
author = {Cribari Neto, Francisco and Ferrari, Sílvia Lopes de Paula and Cordeiro, Gauss Moutinho},
year = {2000},
doi = {10.1093/biomet/87.4.907},
journal   = {Biometrika}
}