@article{MZM_1977_22_4_a7,
     author = {M. A. Lunina},
     title = {An arithmetical examples of {a~non-Borel} {Luzin} analytic set},
     journal = {Matemati\v{c}eskie zametki},
     pages = {525--534},
     publisher = {mathdoc},
     volume = {22},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_22_4_a7/}
}