@article{AIHPB_1985__21_2_157_0,
     author = {Darling, R. W. R.},
     title = {Convergence of martingales on manifolds of negative curvature},
     journal = {Annales de l'I.H.P. Probabilit\'es et statistiques},
     pages = {157--175},
     publisher = {Gauthier-Villars},
     volume = {21},
     number = {2},
     year = {1985},
     mrnumber = {798893},
     zbl = {0565.60042},
     language = {en},
     url = {http://www.numdam.org/item/AIHPB_1985__21_2_157_0/}
}