Michael Schapira, Yaron Singer. Inapproximability of Combinatorial Public Projects. In Christos H. Papadimitriou, Shuzhong Zhang, editors, Internet and Network Economics, 4th International Workshop, WINE 2008, Shanghai, China, December 17-20, 2008. Proceedings. Volume 5385 of Lecture Notes in Computer Science, pages 351-361, Springer, 2008. [doi]