1. Circuits and trees in oriented linear graphs;van Aardenne-Ehrenfest;Simon Stevin,1951
2. The Burnside Problem and Identities in Groups;Adjan,1979
3. The ubiquitous Prouhet–Thue–Morse sequence;Allouche,1999
4. Automatic Sequences;Allouche,2003
5. Solution directe du problème résolu par M. Bertrand;André;Comptes Rendus Acad. Sci. Paris,1887