%0 Journal Article
%A Miller, G. A.
%T Extension of a group by operators of orders two and four.
%J Prace Matematyczno-Fizyczne
%D 1911
%P 69-71
%V 22
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PMF_1911_22_1_a5/
%G en
%F PMF_1911_22_1_a5