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2. Euler, L.: Mémoires de l’Academie Royale des Sciences et Belles Lettres. Année 15, 310–337 (1766)
3. Mordecki, E.: On the Number of Knight’s Tours. Pre-publicaciones de Matematica de la Universidad de la Republica, Uruguay, 2001/57 (2001), http://premat.fing.edu.uy/
4. Löbbing, M., Wegener, I.: The Number of Knight’s Tours Equals 33,439,123,484,294 – Counting with Binary Decision Diagrams. Electronic Journal of Combinatorics 3(1), R5 (1996)
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