1. Campbell, N.A.: Robust procedures in multivariate analysis I: robust covariance estimation. J. R. Stat. Soc. Ser. C Appl. Stat. 29(3), 231–237 (1980)
2. Choi, Y.S., Huh, M.H.: Resistant singular value decomposition and its statistical application. J. Korean Stat. Soc. 25, 9–66 (1996)
3. Cox, T.F., Cox, M.A.A.: Multidimensional scaling, 2nd edition, Chapman &
Hall/CRC, Boca Raton, New York (2001)
4. Durrett, R.: Brownian Motion and Martingales in Analysis. Wadsworth Inc, Belmont (1984)
5. Eckart, C., Young, G.: The approximation of one matrix by another of lower rank. Psychometrika 1, 211–218 (1936)