%0 Journal Article
%A Bernt Lindström
%T On Group and Nongroup Perfect Codes in q Symbols.
%J Mathematica Scandinavica
%D 1969
%P 149-158
%V 25
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1969__25_166112/
%F MS2_1969__25_166112