@article{MT_2015_18_2_a5,
     author = {I. V. Podvigin},
     title = {On the rate of convergence in the individual ergodic theorem for the action of a semigroup},
     journal = {Matemati\v{c}eskie trudy},
     pages = {93--111},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2015_18_2_a5/}
}