Chida, Kota, Erik D. Demaine, Martin L. Demaine, David Eppstein, Adam Hesterberg, Takashi Horiyama, John Iacono, Hiro Ito, Stefan Langerman, Ryuhei Uehara, and Yushi Uno. 2023. “Multifold Tiles of Polyominoes and Convex Lattice Polygons: Discrete and Computational Geometry, Graphs, and Games”. Thai Journal of Mathematics 21 (4):957–978. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1559.