Eszter K. Horváth, Zoltán Németh, Gabriella Pluhár. The number of triangular islands on a triangular grid. Periodica Mathematica Hungarica, 58(1):25-34, 2009. [doi]
@article{HorvathNP09,
title = {The number of triangular islands on a triangular grid},
author = {Eszter K. Horváth and Zoltán Németh and Gabriella Pluhár},
year = {2009},
doi = {10.1007/s10998-009-9025-7},
url = {http://dx.doi.org/10.1007/s10998-009-9025-7},
researchr = {https://researchr.org/publication/HorvathNP09},
cites = {0},
citedby = {0},
journal = {Periodica Mathematica Hungarica},
volume = {58},
number = {1},
pages = {25-34},
}