@article{IVM_1987_3_a2,
     author = {A. S. Belov and M. B. Ermolaev},
     title = {Two simple counterexamples relating to a~problem of {A.~R\'enyi}},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {13--17},
     publisher = {mathdoc},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1987_3_a2/}
}