Takehiro Tanaka, Tetsuya Murai, Yasuo Kudo, Seiki Akania. Rough sets in crisp and fuzzy granular hierarchical structures. In 2014 IEEE International Conference on Granular Computing, GrC 2014, Noboribetsu, Japan, October 22-24, 2014. pages 286-291, IEEE, 2014. [doi]
Abstract is missing.