作者: Werner A. Stahel

FRANK R. HAMPEL, Ph D, is Professor of Statistics in the Department of Mathematics at the Swiss Federal Institute of Technology (ETH) Zurich, Switzerland. ELVEZIO M. RONCHETTI, Ph D, is Professor of Statistics in the Department of Econometrics at the University of Geneva in Switzerland. PETER J. ROUSSEEUW, Ph D, is Professor in the Department of Mathematics and Computer Science at the University of Antwerp in Belgium. WERNER A. STAHEL, Ph D, is Professor at the Swiss Federal Institute of Technology (ETH) Zurich, Switzerland.