Mihai Ciucu, Theresia Eisenkölbl, Christian Krattenthaler, D. Zare. Enumeration of Lozenge Tilings of Hexagons with a Central Triangular Hole. Journal of Combinatorial Theory, Series A, 95(2):251-334, 2001. [doi]
@article{CiucuEKZ01,
title = {Enumeration of Lozenge Tilings of Hexagons with a Central Triangular Hole},
author = {Mihai Ciucu and Theresia Eisenkölbl and Christian Krattenthaler and D. Zare},
year = {2001},
doi = {10.1006/jcta.2000.3165},
url = {http://dx.doi.org/10.1006/jcta.2000.3165},
researchr = {https://researchr.org/publication/CiucuEKZ01},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {95},
number = {2},
pages = {251-334},
}