Zhihe Liang. On the Graceful Conjecture of Permutation Graphs of Paths. Ars Comb., 91, 2009.
@article{Liang09-12,
title = {On the Graceful Conjecture of Permutation Graphs of Paths},
author = {Zhihe Liang},
year = {2009},
researchr = {https://researchr.org/publication/Liang09-12},
cites = {0},
citedby = {0},
journal = {Ars Comb.},
volume = {91},
}