REFERENCES
- S. Golomb, Polyominoes, 2nd ed., Princeton University Press, Princeton, NJ, 1996.
- Frank Meyer, ElementaryCycle.zip, at http://www.normalisiert.de/
- Robert Tarjan, Depth-first search and linear graph algorithms, SIAM Journal on Computing 1(2) (1972) 146–160. http://dx.doi.org/10.1137/0201010
- Donald B. Johnson, Finding All the Elementary Circuits of a Directed Graph, SIAM Journal on Computing 4(1) (1975) 77–84. http://dx.doi.org/10.1137/0204007
- Branko Grünbaum and G. C. Shephard, Tilings and Patterns, Freeman, New York, 1987.
- Roger Penrose, Pentaplexity: a class of non-periodic tilings of the plane, The Math Intelligencer 2 (1979-1980).
- R. Robinson, Comments on the Penrose tiles, mimeographed notes (8 pages), 1975.