%0 Journal Article
%A Gerhard X. Ritter
%T On fixed point free involutions of $R^1 × S^2$
%J Colloquium Mathematicum
%D 1976
%P 237-240
%V 36
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm-36-2-237-240/
%R 10.4064/cm-36-2-237-240
%G en
%F 10_4064_cm_36_2_237_240