@article{MZM_2009_86_3_a7,
     author = {V. A. Kolmykov},
     title = {On {Commuting} {Mappings}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {389--393},
     year = {2009},
     volume = {86},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_86_3_a7/}
}