%0 Journal Article
%A Song, Seok-Zun
%A Kang, Kyung-Tae
%A Yi, Sucheol
%T Perimeter preservers of nonnegative integer matrices
%J Commentationes Mathematicae Universitatis Carolinae
%D 2004
%P 9-15
%V 45
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_2004__45_1_a1/
%G en
%F CMUC_2004__45_1_a1