Eidenbenz, Stephan Finding minimum hidden guard sets in polygons — tight approximability results. (English) Zbl 1157.65329 Comput. Geom. 34, No. 2, 49-57 (2006). MSC: 65D18 × Cite Format Result Cite Review PDF Full Text: DOI
Eidenbenz, Stephan Inapproximability of finding maximum hidden sets on polygons and terrains. (English) Zbl 0998.68190 Comput. Geom. 21, No. 3, 139-153 (2002). MSC: 68U05 × Cite Format Result Cite Review PDF Full Text: DOI