%0 Journal Article
%A Wulf Rehder
%T On the commutativity of two projections.
%J Elemente der Mathematik
%D 1980
%P 120-122
%V 35
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ELMA_1980__35_141250/
%F ELMA_1980__35_141250