@article{TM_1974_131_a15,
     author = {M. K. Potapov},
     title = {The structural and constructive characterization of certain classes of functions},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {211--231},
     publisher = {mathdoc},
     volume = {131},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1974_131_a15/}
}