@article {li1991min,
	title = {Min{\textendash}max asymptotic variance of M-estimates of location when scale is unknown},
	journal = {Statistics \& Probability Letters},
	volume = {11},
	number = {2},
	year = {1991},
	pages = {139{\textendash}145},
	publisher = {Elsevier},
	author = {Li, Bing and Zamar, Ruben H}
}
