Edith Hemaspaandra, Lane A. Hemaspaandra, Harald Hempel. All superlinear inverse schemes are coNP-hard. Theoretical Computer Science, 345(2-3):345-358, 2005. [doi]
@article{HemaspaandraHH05,
title = {All superlinear inverse schemes are coNP-hard},
author = {Edith Hemaspaandra and Lane A. Hemaspaandra and Harald Hempel},
year = {2005},
doi = {10.1016/j.tcs.2005.07.015},
url = {http://dx.doi.org/10.1016/j.tcs.2005.07.015},
researchr = {https://researchr.org/publication/HemaspaandraHH05},
cites = {0},
citedby = {0},
journal = {Theoretical Computer Science},
volume = {345},
number = {2-3},
pages = {345-358},
}