The relationship between algebraic numbers and expansiveness of automorphisms on compact abelian groups Nobuo Aoki, Masahito Dateyama (1983) Fundamenta Mathematicae
The splitting of zero-dimensional automorphisms and its application Nobuo Aoki (1985) Colloquium Mathematicae
Three results on mixing shapes. Ward, Thomas B. (1997) The New York Journal of Mathematics [electronic only]