1. P. Bloomfield and W.L. Steiger. Least absolute deviations: Theory, applications and algorithms. Birkhäuser, Boston, 1983.
2. P.L. Davies. Aspects of robust linear regression. Ann. Statist., 21(4):1843–1899,1993.
3. R. Durrett. Probability: Theory and examples. Duxbury Press, Belmont, CA, second edition, 1996.
4. D.K. Hildebrand. Lord’s MAD paradox and Jensen’s inequality. Am. Statist., 38(4):296–297, 1984.
5. K. Hinderer. Grundbegriffe der Wahrscheinlichkeitstheorie. Springer, Berlin, 1972.