David Pokrass Jacobs. Undecidability of Winkler s ::::r::::-Neighborhood Problem for Covering Digraphs. Journal of Combinatorial Theory, Series A, 60(2):254-267, 1994. [doi]
@article{Jacobs94:2,
title = {Undecidability of Winkler s ::::r::::-Neighborhood Problem for Covering Digraphs},
author = {David Pokrass Jacobs},
year = {1994},
doi = {10.1006/jctb.1994.1017},
url = {http://dx.doi.org/10.1006/jctb.1994.1017},
researchr = {https://researchr.org/publication/Jacobs94%3A2},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {60},
number = {2},
pages = {254-267},
}