%0 Journal Article
%A J. E. Roberts
%T Must there be a~gauge group?
%J Informatics and Automation
%D 1975
%P 206-209
%V 135
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1975_135_a23/
%G en
%F TRSPY_1975_135_a23