1. Adler, R., Weiss, B (1967): Entropy, a complete metric invariant for automorphisms of the torus. Proc. Natl. Acad. Sci. USA 57, No. 6, 1573–1576. Zbl. 177,80.
2. Adler, R., Weiss, B. (1970): Similarity of Automorphisms of the Torus. Mem. Am. Math. Soc. 98, 1–43. Zbl. 195,61
3. Alekseev, V.M. (1968/1969): Quasirandom dynamical systems I. Mat. Sb. Nov. Ser. 76 (1968), 72-134
4. II Mat. Sb. Nov. Ser. 77(1968), 545-601
5. III Mat. Sb. Nov. Ser. 79 (1969), 3-50. [English transi.: I. Math. USSR, Sb. 5, 73-128 (1969)