%0 Journal Article
%A Krzysztof Prażmowski
%T Groups of squares and half-equivalences in geometry
%J Colloquium Mathematicum
%D 1987
%P 157-168
%V 53
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm-53-2-157-168/
%R 10.4064/cm-53-2-157-168
%G en
%F 10_4064_cm_53_2_157_168