[1]
L.B. Turksen: Interval valued fuzzy sets based on normal forms. Fuzzy Sets and Systems, Vol. 80(1986), pp.191-210.
DOI: 10.1016/0165-0114(86)90077-1
Google Scholar
[2]
L.A. Zadeh: Fuzzy sets. Information and Control, Vol. 8(1965), pp.338-353.
Google Scholar
[3]
M.B. Gorzalczany: A method of inference in approximate reasoning based on interval-valued fuzzy sets. Fuzzy Sets and Systems, Vol. 21(1987), pp.1-17.
DOI: 10.1016/0165-0114(87)90148-5
Google Scholar
[4]
H. Bustince: Indicator of inclusion grade for interval-valued fuzzy sets, application to approximate reasoning based on interval-valued fuzzy sets. International Journal of Approximation Reasoning, Vol. 23(2000), pp.137-209.
DOI: 10.1016/s0888-613x(99)00045-6
Google Scholar
[5]
L.B. Turksen, Z. Zhong: An approximate analogical reasoning schema baded on similarity measures and interval-valued fuzzy sets. Fuzzy Sets and Systems, Vol. 34(1990), pp.323-346.
DOI: 10.1016/0165-0114(90)90218-u
Google Scholar
[6]
C. Cornelis, G. Deschrijver, E.E. Kerre: Implication in intuition-istic fuzzy and interval-valued fuzzy set theory: constructive, classification, application. International Journal of Approximation Reasoning, Vol. 35(2004), pp.55-95.
DOI: 10.1016/s0888-613x(03)00072-0
Google Scholar
[7]
C. Cornelis, M.D. Cock E.E. Kerre: Intuitionistic fuzzy rough sets: at the crossroads of imperfect knowledge. Expert Systems, Vol. 20(2003), pp.260-270.
DOI: 10.1111/1468-0394.00250
Google Scholar
[8]
W.X. Zhang, W.Z. Wu,L.J. Ye: Rough Sets Theory and Methods, Beijing: Scinence Press, (2001).
Google Scholar
[9]
H.Y. Zhang W.X. Zhang,W. -Z. Wu: On characterization of genernalized interval-valued fuzzy rough sets on two universes of discourse. International Journal of Approximate Reasoning, Vol. 51(2009), pp.56-70.
DOI: 10.1016/j.ijar.2009.07.002
Google Scholar