@article{ZNSL_2012_403_a2,
     author = {A. M. Vershik},
     title = {On classification of measurable functions of several variables},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {35--57},
     year = {2012},
     volume = {403},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2012_403_a2/}
}