Mihai Ciucu, Christian Krattenthaler. Enumeration of Lozenge Tilings of Hexagons with Cut-Off Corners. Journal of Combinatorial Theory, Series A, 100(2):201-231, 2002. [doi]
@article{CiucuK02,
title = {Enumeration of Lozenge Tilings of Hexagons with Cut-Off Corners},
author = {Mihai Ciucu and Christian Krattenthaler},
year = {2002},
doi = {10.1006/jcta.2002.3288},
url = {http://dx.doi.org/10.1006/jcta.2002.3288},
researchr = {https://researchr.org/publication/CiucuK02},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {100},
number = {2},
pages = {201-231},
}