Andrzej Skowron, Roman W. Swiniarski. Rough Sets and Higher Order Vagueness. In Dominik Slezak, Guoyin Wang, Marcin S. Szczuka, Ivo Düntsch, Yiyu Yao, editors, Rough Sets, Fuzzy Sets, Data Mining, and Granular Computing, 10th International Conference, RSFDGrC 2005, Regina, Canada, August 31 - September 3, 2005, Proceedings, Part I. Volume 3641 of Lecture Notes in Computer Science, pages 33-42, Springer, 2005. [doi]
Abstract is missing.