1. Lecture Notes in Mathematics;A. Ancona,1990
2. A. Avez, Théorème de Choquet-Deny pour les groupes à croissance non exponentielle, Comptes Rendus Hebdomadaires des Séances de l’Académie des Sciences. Séries A 279 (1974), 25–28.
3. Lecture Notes in Mathematics;R. Azencott,1970
4. M. Babillot, An introduction to Poisson boundaries of Lie groups, in ProbabilityMeasures on Groups: Recent Directions and Trends, Tata Institute of Fundamental Research, Mumbai, 2006, pp. 1–90.
5. W. Ballmann and F. Ledrappier, The Poisson boundary for rank one manifolds and their cocompact lattices, Forum Mathematicum 6 (1994), 301–313.