Reference 7
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[7]
Kazuhisa Makino, Suguru Tamaki and Masaki Yamamoto,
On the Boolean connectivity problem for Horn relations,
Discrete Applied Mathematics 158(18), pp. 2024-2030, 2010. (LINK)
On the Boolean connectivity problem for Horn relations,
Discrete Applied Mathematics 158(18), pp. 2024-2030, 2010. (LINK)