Yong Wang, Angsheng Li. A hierarchy for the plus cupping Turing degrees. Journal of Symbolic Logic, 68(3):972-988, 2003.
@article{WangL03:25,
title = {A hierarchy for the plus cupping Turing degrees},
author = {Yong Wang and Angsheng Li},
year = {2003},
researchr = {https://researchr.org/publication/WangL03%3A25},
cites = {0},
citedby = {0},
journal = {Journal of Symbolic Logic},
volume = {68},
number = {3},
pages = {972-988},
}