- Catalog of Toothpick and CA Sequences in OEIS
- Index to sequences in the OEIS related to toothpicks
- Toothpick structures on hexagonal net
- David Applegate, Omar E. Pol, N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, 2010.
- N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS, 2009.