1. G. M. Adel'son-Vel'skii and Yu. A. Sreider, The Banach mean on groups. (Russian)Uspekhi Mat. Nauk, Nov. Ser. 12 (1957), No. 6, 131–136.
2. S. I. Adyan, Random walks on free periodic groups.Math. USSR Izv. (Russian)21 (1983), No. 3, 425–434.
3. J. M. Alonso, Growth functions of amalgams. In: Arboreal Group Theory, Vol. 19. R. C. Alperin ed.,MSRI Publ, Springer, 1991, 1–34.
4. V. Arnold and A. Krylov, Uniform distribution of points on a sphere and some ergodic properties of solutions of linear differential equations in a complex region. (Russian)Dokl. Akad. Nauk SSSR 148 (1963), 9–12.
5. A. Avez, Entropie des groupes de type fini.C. R. Acad. Sci. Paris, Sér. A275 (1972), 1363–1366.