TY  - JOUR
AU  - Zhang, Xiaoling
AU  - Deng, Kecai
TI  - Characterization Results for the L(2, 1, 1)-Labeling Problem on Trees
JO  - Discussiones Mathematicae. Graph Theory
PY  - 2017
SP  - 611
EP  - 622
VL  - 37
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DMGT_2017_37_3_a8/
LA  - en
ID  - DMGT_2017_37_3_a8
ER  -