@article{TRSPY_1968_94_a2,
     author = {S. A. Gel'fer},
     title = {The variational method in the theory of parametrically representable analytic functions},
     journal = {Informatics and Automation},
     pages = {19--26},
     publisher = {mathdoc},
     volume = {94},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1968_94_a2/}
}