@article{IVM_2006_1_a7,
     author = {A. N. Frolov},
     title = {Set-theoretic reducibilities in a lattice of sets},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {57--67},
     publisher = {mathdoc},
     number = {1},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2006_1_a7/}
}