Fuji Zhang, Xueliang Li, Heping Zhang. Hexagonal Systems with Fixed Bonds. Discrete Applied Mathematics, 47(3):285-296, 1993. [doi]
@article{ZhangLZ93,
title = {Hexagonal Systems with Fixed Bonds},
author = {Fuji Zhang and Xueliang Li and Heping Zhang},
year = {1993},
doi = {10.1016/0166-218X(93)90133-9},
url = {http://dx.doi.org/10.1016/0166-218X(93)90133-9},
researchr = {https://researchr.org/publication/ZhangLZ93},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {47},
number = {3},
pages = {285-296},
}