Itsik Pe er, Ron Shamir. Satisfiability Problems on Intervals and Unit Intervals. Theoretical Computer Science, 175(2):349-372, 1997. [doi]
@article{PeerS97,
title = {Satisfiability Problems on Intervals and Unit Intervals},
author = {Itsik Pe er and Ron Shamir},
year = {1997},
doi = {10.1016/S0304-3975(96)00208-3},
url = {http://dx.doi.org/10.1016/S0304-3975(96)00208-3},
researchr = {https://researchr.org/publication/PeerS97},
cites = {0},
citedby = {0},
journal = {Theoretical Computer Science},
volume = {175},
number = {2},
pages = {349-372},
}