Magnús M. Halldórsson, Keisuke Tanaka. Approximation and Special Cases of Common Subtrees and Editing Distance. In Tetsuo Asano, Yoshihide Igarashi, Hiroshi Nagamochi, Satoru Miyano, Subhash Suri, editors, Algorithms and Computation, 7th International Symposium, ISAAC 96, Osaka, Japan, December 16-18, 1996, Proceedings. Volume 1178 of Lecture Notes in Computer Science, pages 75-84, Springer, 1996.
Abstract is missing.