  The Riemannian center of mass was constructed in [GrKa] (1973). In [GKR1,
GKR2, Gr, Ka, BuKa] (1974-1981) it was successfully applied with more refined
estimates. Probably in 1990 someone renamed it without justification into
karcher mean and references to the older papers were omitted by those using the
new name. As a consequence newcomers started to reprove results from the above
papers. - Here I explain the older history.
