@article{AL_1975_14_5_a1,
     author = {S. D. Denisov},
     title = {A two-element separable enumerated set $\gamma $ with an},
     journal = {Algebra i logika},
     pages = {523--532},
     publisher = {mathdoc},
     volume = {14},
     number = {5},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1975_14_5_a1/}
}