This paper describes a method of robust estimation of shift and scale parameters in a mixed unbalanced interlaboratory model. Estimators presented result from "easily computable" Fréchet differentiable functionals which enjoy some optimal properties in a small neighborhood of the model. A rigorous treatment of their asymptotic behaviour under departures from the model assumptions and a simulation study are given.
"Robust estimation of parameters in a mixed unbalanced model." Ann. Statist. 24 (4) 1493 - 1510, August 1996. https://doi.org/10.1214/aos/1032298279