@article{TRSPY_1971_112_a23,
     author = {P. L. Ul'yanov},
     title = {Representation of functions of the class $\varphi (L)$ by series},
     journal = {Informatics and Automation},
     pages = {372--384},
     publisher = {mathdoc},
     volume = {112},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1971_112_a23/}
}