John Harding, Carol L. Walker, Elbert A. Walker. The variety generated by the truth value algebra of type-2 fuzzy sets. Fuzzy Sets and Systems, 161(5):735-749, 2010. [doi]
@article{HardingWW10,
title = {The variety generated by the truth value algebra of type-2 fuzzy sets},
author = {John Harding and Carol L. Walker and Elbert A. Walker},
year = {2010},
doi = {10.1016/j.fss.2009.07.004},
url = {http://dx.doi.org/10.1016/j.fss.2009.07.004},
tags = { algebra},
researchr = {https://researchr.org/publication/HardingWW10},
cites = {0},
citedby = {0},
journal = {Fuzzy Sets and Systems},
volume = {161},
number = {5},
pages = {735-749},
}