1. Three distance theorems and combinatorics on words;Alessandri;Enseign. Math.,1998
2. Aperiodic Order 1: A Mathematical Invitation;Baake,2013
3. Trace maps, invariants, and some of their applications;Baake;Internat. J. Modern Phys. B,1993
4. Periodic orbits of difference equations;Beardon;Proc. Roy. Soc. Edinburgh,1995
5. Autour du système de numération d’Ostrowski;Berthé;Bull. Belgian Math. Soc.,2001