Applegate, David; Pol, Omar E.; Sloane, N. J. A. (2010). «The toothpick sequence and other sequences from cellular automata». Proceedings of the Forty-First Southeastern International Conference on Combinatorics, Graph Theory and Computing. Congressus Numerantium. 206. pp. 157–191. arXiv: 1004.3036. Bibcode: 2010arXiv1004.3036A. MR: 2762248.
arxiv.org
Applegate, David; Pol, Omar E.; Sloane, N. J. A. (2010). «The toothpick sequence and other sequences from cellular automata». Proceedings of the Forty-First Southeastern International Conference on Combinatorics, Graph Theory and Computing. Congressus Numerantium. 206. pp. 157–191. arXiv: 1004.3036. Bibcode: 2010arXiv1004.3036A. MR: 2762248.
Mike Warburton, "Ulam-Warburton Automaton - Counting Cells with Quadratics ", arXiv:1901.10565
Khovanova, Tanya; Nie, Eric; Puranik, Alok «The Sierpinski Triangle and the Ulam-Warbuton Automaton». Math Horizons, 23, 1, 2014, pàg. 5-9. arXiv: 1408.5937.
harvard.edu
ui.adsabs.harvard.edu
Applegate, David; Pol, Omar E.; Sloane, N. J. A. (2010). «The toothpick sequence and other sequences from cellular automata». Proceedings of the Forty-First Southeastern International Conference on Combinatorics, Graph Theory and Computing. Congressus Numerantium. 206. pp. 157–191. arXiv: 1004.3036. Bibcode: 2010arXiv1004.3036A. MR: 2762248.
