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A Robust Estimation based on Rank tests.
See also L-Estimate, M-Estimate, Robust Estimation
References
Press, W. H.; Flannery, B. P.; Teukolsky, S. A.; and Vetterling, W. T.  ``Robust Estimation.''  §15.7 in
  Numerical Recipes in FORTRAN: The Art of Scientific Computing, 2nd ed.  Cambridge, England:
  Cambridge University Press, pp. 694-700, 1992.