1. Structural aspects of tilings;Ballier,2008
2. The undecidability of the domino problem;Berger;Mem. Amer. Math. Soc. No.,1966
3. Π^0_1 classes in mathematics;Cenzer,1998
4. Members of countable Π^0_1 classes;Cenzer;Ann. Pure Appl. Logic,1986
5. Tilings and quasiperiodicity;Durand;Theoret. Comput. Sci.,1999