@article{AL_1969_8_2_a0,
     author = {M. M. Arslanov},
     title = {Effectively hypersimple sets},
     journal = {Algebra i logika},
     pages = {143--153},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1969_8_2_a0/}
}