Timothy J. Long, Alan L. Selman. Relativizing complexity classes with sparse oracles. Journal of the ACM, 33(3):618-627, 1986. [doi]
@article{LongS86,
title = {Relativizing complexity classes with sparse oracles},
author = {Timothy J. Long and Alan L. Selman},
year = {1986},
doi = {10.1145/5925.5938},
url = {http://doi.acm.org/10.1145/5925.5938},
researchr = {https://researchr.org/publication/LongS86},
cites = {0},
citedby = {0},
journal = {Journal of the ACM},
volume = {33},
number = {3},
pages = {618-627},
}