Peter Koepke, Benjamin Seyfferth. Ordinal machines and admissible recursion theory. Annals of Pure and Applied Logic, 160(3):310-318, 2009. [doi]
@article{KoepkeS09,
title = {Ordinal machines and admissible recursion theory},
author = {Peter Koepke and Benjamin Seyfferth},
year = {2009},
doi = {10.1016/j.apal.2009.01.005},
url = {http://dx.doi.org/10.1016/j.apal.2009.01.005},
researchr = {https://researchr.org/publication/KoepkeS09},
cites = {0},
citedby = {0},
journal = {Annals of Pure and Applied Logic},
volume = {160},
number = {3},
pages = {310-318},
}