@inbook {yohai1991procedure,
	title = {A procedure for robust estimation and inference in linear regression},
	booktitle = {Directions in robust statistics and diagnostics},
	year = {1991},
	pages = {365{\textendash}374},
	publisher = {Springer},
	organization = {Springer},
	author = {Yohai, V{\'\i}ctor J and Stahel, Werner A and Zamar, Ruben H}
}
