@article{DMGT_2019_39_1_a19,
     author = {Yeh, Roger K.},
     title = {Pair {L(2,} {1)-Labelings} of {Infinite} {Graphs}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {257--269},
     publisher = {mathdoc},
     volume = {39},
     number = {1},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2019_39_1_a19/}
}