1. [1] Birman, Joan S.; Series, Caroline Dehn’s algorithm revisited, with applications to simple curves on surfaces, Combinatorial group theory and topology (Alta, Utah, 1984) (Ann. of Math. Stud.) Volume 111, Princeton Univ. Press, Princeton, NJ, 1987, pp. 451-478
2. [2] Bowen, Lewis; Bufetov, Alexander; Romaskevich, Olga Mean convergence of Markovian spherical averages for measure-preserving actions of the free group, Geom. Dedicata, Volume 181 (2016), pp. 293-306
3. [3] Bowen, Lewis; Nevo, Amos Von Neumann and Birkhoff ergodic theorems for negatively curved groups, Ann. Sci. Éc. Norm. Supér. (4), Volume 48 (2015) no. 5, pp. 1113-1147
4. [4] Bowen, Rufus; Series, Caroline Markov maps associated with Fuchsian groups, Inst. Hautes Études Sci. Publ. Math. (1979) no. 50, pp. 153-170
5. [5] Bufetov, A. I. Operator ergodic theorems for actions of free semigroups and groups, Funct. Anal. Appl, Volume 34 (2000) no. 4, pp. 239-251