%0 Journal Article
%A Freedman, H. I.
%T On a Bifurcation Theorem of Hopf and Friedrichs*
%J Canadian mathematical bulletin
%D 1977
%P 95-102
%V 20
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-016-x/
%R 10.4153/CMB-1977-016-x
%F 10_4153_CMB_1977_016_x