1. Ancona, A. (1985) Variétés a courbure negative, opérateurs elliptiques, et frontière de Martin, CRAS A301, 193–196.
2. Anderson, M. T. (1983) The Dirichlet problem at infinity for manifolds of negative curvature, J. Diff. Geom. 18, 701–721.
3. Anderson, M. and Schoen, R. (1985) Positive harmonic functions on complete manifolds of negative curvature, Ann. Math. 121, 429–461.
4. Antonelli, P. L., Chapin, J., and Voorhees, B. H. (1980) The geometry of random genetic drift VI. A random selection diffusion model, Adv. Appi. Prob. 12, 50–58 (see also references therein).
5. Azencott, R. (1974) Behavior of diffusion semigroups at infinity, Bull. Sci. Math. 102, 193–240.