@article{RM_2011_66_3_a3,
     author = {A. I. Bufetov and A. V. Klimenko and M. I. Khristoforov},
     title = {Ces\`aro convergence of spherical averages for {Markov} groups and semigroups},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {633--634},
     publisher = {mathdoc},
     volume = {66},
     number = {3},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2011_66_3_a3/}
}