References
- Andrews , D. F. , Bickel , P. J. , Hampel , F. R. , Huber , P. J. , Rogers , W. H. and Tukey , J. W. 1972 . Robust Estimates of Location: Survey and Advances , Princeton, N. J : Princeton Univ. Press .
- Huber , P. J. 1964 . Robust estimation of a location parameter . Ann. Math. Statist. , 35 : 73 – 101 .