@article{ITA_2016__50_1_105_0,
     author = {Rolin, Nicolas and Ugolnikova, Alexandra},
     title = {Tilings by $1 \times{}            1$ and $2 \times{}          2$},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {105--116},
     publisher = {EDP-Sciences},
     volume = {50},
     number = {1},
     year = {2016},
     doi = {10.1051/ita/2016011},
     zbl = {1346.05028},
     mrnumber = {3518163},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ita/2016011/}
}