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@article{MZM_1980_28_3_a9, author = {A. P. Beltiukov}, title = {Hierarchy of complexity of computation of partial functions with values~0 and~1}, journal = {Matemati\v{c}eskie zametki}, pages = {423--431}, publisher = {mathdoc}, volume = {28}, number = {3}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1980_28_3_a9/} }
A. P. Beltiukov. Hierarchy of complexity of computation of partial functions with values~0 and~1. Matematičeskie zametki, Tome 28 (1980) no. 3, pp. 423-431. http://geodesic.mathdoc.fr/item/MZM_1980_28_3_a9/