@article{RM_1967_22_1_a2,
     author = {A. G. Vitushkin and G. M. Henkin},
     title = {Linear superpositions of functions},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {77--125},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1967},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1967_22_1_a2/}
}