@article{ZNSL_2008_358_a9,
     author = {V. G. Kanovei and V. A. Lyubetskii},
     title = {Borel reducibility as an additive property of domains},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {189--198},
     publisher = {mathdoc},
     volume = {358},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2008_358_a9/}
}