%0 Journal Article
%A Bing Yao
%A Ming Yao
%A Hui Cheng
%T On Gracefulness of Directed Trees with Short Diameters
%J Bulletin of the Malaysian Mathematical Society
%D 2012
%V 35
%N 1
%U http://geodesic.mathdoc.fr/item/BMMS_2012_35_1_a11/
%F BMMS_2012_35_1_a11