%0 Journal Article
%A Takaguchi, Makoto
%T Centers of mass for operator-families
%J Glasgow mathematical journal
%D 1992
%P 123-126
%V 34
%N 1
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500008612/
%R 10.1017/S0017089500008612
%F 10_1017_S0017089500008612