@article{ZNSL_1974_40_a15,
     author = {R. I. Freidson},
     title = {Table approximations to recursive predicates},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {131--135},
     publisher = {mathdoc},
     volume = {40},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1974_40_a15/}
}