Roman Muchnik, Igor Pak. On Tilings by Ribbon Tetrominoes. Journal of Combinatorial Theory, Series A, 88(1):188-193, 1999. [doi]
@article{MuchnikP99,
title = {On Tilings by Ribbon Tetrominoes},
author = {Roman Muchnik and Igor Pak},
year = {1999},
doi = {10.1006/jcta.1999.2980},
url = {http://dx.doi.org/10.1006/jcta.1999.2980},
researchr = {https://researchr.org/publication/MuchnikP99},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {88},
number = {1},
pages = {188-193},
}