%0 Journal Article
%A Zhang, Xiaoling
%A Deng, Kecai
%T Characterization Results for the L(2, 1, 1)-Labeling Problem on Trees
%J Discussiones Mathematicae. Graph Theory
%D 2017
%P 611-622
%V 37
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DMGT_2017_37_3_a8/
%G en
%F DMGT_2017_37_3_a8