P. Kammerer. Excluding Regions. Comput. J., 20(2):128-131, 1977. [doi]
@article{Kammerer77,
title = {Excluding Regions},
author = {P. Kammerer},
year = {1977},
doi = {10.1093/comjnl/20.2.128},
url = {https://doi.org/10.1093/comjnl/20.2.128},
researchr = {https://researchr.org/publication/Kammerer77},
cites = {0},
citedby = {0},
journal = {Comput. J.},
volume = {20},
number = {2},
pages = {128-131},
}