@article{10_1090_S0894_0347_2014_00788_8,
     author = {Gou\"ezel, S\'ebastien},
     title = {Local limit theorem for symmetric random walks in {Gromov-hyperbolic} groups},
     journal = {Journal of the American Mathematical Society},
     pages = {893--928},
     year = {2014},
     volume = {27},
     number = {3},
     doi = {10.1090/S0894-0347-2014-00788-8},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-2014-00788-8/}
}