@article{SM_2008_199_6_a2,
     author = {V. K. Zakharov and T. V. Rodionov},
     title = {Classification of {Borel} sets and functions for an arbitrary space},
     journal = {Sbornik. Mathematics},
     pages = {833--869},
     year = {2008},
     volume = {199},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2008_199_6_a2/}
}