%0 Journal Article
%A T. Furuta
%T An elementary proof of Hadamard's theorem
%J Matematički vesnik
%D 1971
%P 267 
%V 23
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MV_1971_23_1_a30/
%F MV_1971_23_1_a30