Thomas H. Payne. Concrete computability. Notre Dame Journal of Formal Logic, 16(2):238-244, 1975. [doi]
@article{Payne75-0,
title = {Concrete computability},
author = {Thomas H. Payne},
year = {1975},
doi = {10.1305/ndjfl/1093891704},
url = {http://dx.doi.org/10.1305/ndjfl/1093891704},
researchr = {https://researchr.org/publication/Payne75-0},
cites = {0},
citedby = {0},
journal = {Notre Dame Journal of Formal Logic},
volume = {16},
number = {2},
pages = {238-244},
}