Key points are not available for this paper at this time.
Forrest W. Young, Yoshio Takane, Rostylaw Lewyckyj, ALSCAL: A Multidimensional Scaling Package with Several Individual Differences Options, The American Statistician, Vol. 34, No. 2 (May, 1980), pp. 117-118
Young et al. (Thu,) studied this question.