\(\sigma\)-morphic sets of prototiles
A set of prototiles is called \(\sigma\)-morphic if it admits a countable infinity of distinct tilings. The author constructs \(\sigma\)-morphic sets of prototiles (with more then one element) which are almost all periodic. In particular, sets of two, three, four, five prototiles are described. You can find some open questions in the remarks.
scientific article; zbMATH DE number 3998657