@article{MZM_2006_80_1_a20,
     author = {V. A. Sereda and A. I. Sozutov},
     title = {On a {Question} in the {Kourovka} {Notebook}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {154--155},
     publisher = {mathdoc},
     volume = {80},
     number = {1},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2006_80_1_a20/}
}