Frank Stephan, Jason Teutsch. Immunity and Hyperimmunity for Sets of Minimal Indices. Notre Dame Journal of Formal Logic, 49(2):107-125, 2008. [doi]
@article{StephanT08,
title = {Immunity and Hyperimmunity for Sets of Minimal Indices},
author = {Frank Stephan and Jason Teutsch},
year = {2008},
url = {http://projecteuclid.org/euclid.ndjfl/1210859921},
researchr = {https://researchr.org/publication/StephanT08},
cites = {0},
citedby = {0},
journal = {Notre Dame Journal of Formal Logic},
volume = {49},
number = {2},
pages = {107-125},
}