Ming-Wen Shao, Hong-Zhi Yang, Shi-Qing Fan. Set Approximations in Multi-level Conceptual Data. In Jingtao Yao, Pawan Lingras, Wei-Zhi Wu, Marcin S. Szczuka, Nick Cercone, Dominik Slezak, editors, Rough Sets and Knowledge Technology, Second International Conference, RSKT 2007, Toronto, Canada, May 14-16, 2007, Proceedings. Volume 4481 of Lecture Notes in Computer Science, pages 355-363, Springer, 2007. [doi]
Abstract is missing.