Bin Fu, Hong-Zhou Li. On Symmetric Differences of NP-hard Sets with Weakly-P-Selective Sets. In Toshihide Ibaraki, Yasuyoshi Inagaki, Kazuo Iwama, Takao Nishizeki, Masafumi Yamashita, editors, Algorithms and Computation, Third International Symposium, ISAAC 92, Nagoya, Japan, December 16-18, 1992, Proceedings. Volume 650 of Lecture Notes in Computer Science, pages 439-448, Springer, 1992.
Abstract is missing.