@article{IVM_1980_5_a7,
     author = {E. A. Polyakov},
     title = {On the theory of recursive functionals and effective operations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {37--39},
     year = {1980},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1980_5_a7/}
}