七格骨牌 (Chinese Wikipedia)
Analysis of information sources in references of the Wikipedia article "七格骨牌" in Chinese language version.
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archive.org
- Grünbaum, Branko; Shephard, G. C. Tilings and Patterns
. New York: W. H. Freeman and Company. 1987. ISBN 0-7167-1193-1.
doi.org
- Redelmeier, D. Hugh. Counting polyominoes: yet another attack. Discrete Mathematics. 1981, 36 (2): 191–203. doi:10.1016/0012-365X(81)90237-5.
- Rhoads, Glenn C. Planar tilings by polyominoes, polyhexes, and polyiamonds. Journal of Computational and Applied Mathematics. 2005, 174 (2): 329–353. doi:10.1016/j.cam.2004.05.002
.
mathpuzzle.com
polyominoes.blogspot.com
- "Polyominoes: Even more heptominoes!". [2021-09-26]. （原始内容存档于2021-09-27）.
web.archive.org
- Weisstein, Eric W. (编). Heptomino. at MathWorld--A Wolfram Web Resource. Wolfram Research, Inc. [2008-07-22]. （原始内容存档于2008-12-15） （英语）.
- "Polyominoes: Even more heptominoes!". [2021-09-26]. （原始内容存档于2021-09-27）.
- Image, "An incredible heptomino solution by Patrick Hamlyn" （页面存档备份，存于互联网档案馆）, from Material added Feb-Aug 2001 at MathPuzzzle.com （页面存档备份，存于互联网档案馆）
wolfram.com
mathworld.wolfram.com
- Weisstein, Eric W. (编). Heptomino. at MathWorld--A Wolfram Web Resource. Wolfram Research, Inc. [2008-07-22]. （原始内容存档于2008-12-15） （英语）.