@article{IVM_1998_5_a1,
     author = {A. N. Gorban'},
     title = {A~generalized approximation theorem and an exact representation of polynomials of several variables by superpositions of polynomials of one variable},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {6--9},
     publisher = {mathdoc},
     number = {5},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1998_5_a1/}
}