Ellen Gethner, Doris Schattschneider, Steve Passiouras, J. Joseph Fowler. Combinatorial enumeration of 2×2 ribbon patterns. Eur. J. Comb., 28(4):1276-1311, 2007. [doi]
@article{GethnerSPF07,
title = {Combinatorial enumeration of 2×2 ribbon patterns},
author = {Ellen Gethner and Doris Schattschneider and Steve Passiouras and J. Joseph Fowler},
year = {2007},
doi = {10.1016/j.ejc.2006.01.015},
url = {http://dx.doi.org/10.1016/j.ejc.2006.01.015},
researchr = {https://researchr.org/publication/GethnerSPF07},
cites = {0},
citedby = {0},
journal = {Eur. J. Comb.},
volume = {28},
number = {4},
pages = {1276-1311},
}