Bruno Meriaux Chengfang Ren Mohammed Nabil El Korso Arnaud Breloy Philippe Forster Asymptotic Performance of Complex $M$-Estimators for Multivariate Location and Scatter Estimation. 367-371 2019 26 IEEE Signal Process. Lett. 2 https://doi.org/10.1109/LSP.2019.2891201 db/journals/spl/spl26.html#MeriauxRKBF19