@article {COUSO2014114,
	title = {The notion of roughness of a fuzzy set},
	journal = {Fuzzy Sets and Systems},
	volume = {249},
	year = {2014},
	note = {Theme: Automata Theory and Algebra},
	pages = {114 - 127},
	abstract = {The roughness of a set (according to the notion introduced by Pawlak in 1991) can be regarded as the MZ-distance between its upper and the lower approximations. With this idea in mind, we have generalized Pawlak{\textquoteright}s definition, by replacing the MZ-distance by a general {\textquotedblleft}distance{\textquotedblright} measure. We also generalize the notion of roughness of fuzzy sets introduced by Huyhn and Nakamori in 2005.},
	keywords = {Dissimilarity measure, Divergence measure, fuzzy set, Rough set, Roughness},
	issn = {0165-0114},
	doi = {https://doi.org/10.1016/j.fss.2014.02.013},
	url = {http://www.sciencedirect.com/science/article/pii/S0165011414000657},
	author = {In{\'e}s Couso and Laura Garrido and Luciano S{\'a}nchez}
}
