@article{DMGT_2017_37_3_a8,
     author = {Zhang, Xiaoling and Deng, Kecai},
     title = {Characterization {Results} for the {L(2,} 1, {1)-Labeling} {Problem} on {Trees}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {611--622},
     publisher = {mathdoc},
     volume = {37},
     number = {3},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2017_37_3_a8/}
}