Iiro S. Honkala, Tero Laihonen. On identification in the triangular grid. Journal of Combinatorial Theory, Series A, 91(1):67-86, 2004. [doi]
@article{HonkalaL04,
title = {On identification in the triangular grid},
author = {Iiro S. Honkala and Tero Laihonen},
year = {2004},
doi = {10.1016/j.jctb.2003.10.002},
url = {http://dx.doi.org/10.1016/j.jctb.2003.10.002},
researchr = {https://researchr.org/publication/HonkalaL04},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {91},
number = {1},
pages = {67-86},
}