David B. Posner, Robert W. Robinson. Degrees Joining to 0?. Journal of Symbolic Logic, 46(4):714-722, 1981.
@article{PosnerR81,
title = {Degrees Joining to 0?},
author = {David B. Posner and Robert W. Robinson},
year = {1981},
researchr = {https://researchr.org/publication/PosnerR81},
cites = {0},
citedby = {0},
journal = {Journal of Symbolic Logic},
volume = {46},
number = {4},
pages = {714-722},
}