Complexity Spectra of Recursive Sets and Approximability of Initial Segments of Complete Problems.

Mikhail I. Dekhtjar Complexity Spectra of Recursive Sets and Approximability of Initial Segments of Complete Problems. 11-32 1979 15 Elektronische Informationsverarbeitung und Kybernetik 1/2 db/journals/eik/eik15.html#Dekhtjar79