@article{CRMATH_2009__347_15-16_953_0,
     author = {Cuny, Christophe},
     title = {Some optimal pointwise ergodic theorems with rate},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {953--958},
     publisher = {Elsevier},
     volume = {347},
     number = {15-16},
     year = {2009},
     doi = {10.1016/j.crma.2009.04.034},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2009.04.034/}
}