@article{ZNSL_1968_8_a24,
     author = {R. I. Freidson},
     title = {A~complexity characteristic of recursive predicates, which does not depend on standardization of the notion of algorithm},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {225--233},
     publisher = {mathdoc},
     volume = {8},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1968_8_a24/}
}