@article{MT_2005_8_1_a4,
     author = {V. L. Selivanov},
     title = {Variations on {the~Wadge} {Reducibility}},
     journal = {Matemati\v{c}eskie trudy},
     pages = {135--175},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2005_8_1_a4/}
}