@article{BSMF_1994__122_2_209_0,
     author = {Alexopoulos, Georgios and Lohou\'e, No\"el},
     title = {Riesz means on {Lie} groups and riemannian manifolds of nonnegative curvature},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {209--223},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {122},
     number = {2},
     year = {1994},
     doi = {10.24033/bsmf.2229},
     mrnumber = {95h:43011},
     zbl = {0832.22014},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/bsmf.2229/}
}