@article{MZM_2017_102_3_a3,
     author = {V. G. Kanovei and V. A. Lyubetskii},
     title = {A {Countable} {Definable} {Set} {Containing} no {Definable} {Elements}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {369--382},
     publisher = {mathdoc},
     volume = {102},
     number = {3},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2017_102_3_a3/}
}