Siegfried Gottwald. Foundations of a set theory for fuzzy sets. 40 years of development. Int. J. General Systems, 37(1):69-81, 2008. [doi]
@article{Gottwald08-0,
title = {Foundations of a set theory for fuzzy sets. 40 years of development},
author = {Siegfried Gottwald},
year = {2008},
doi = {10.1080/03081070701499922},
url = {http://dx.doi.org/10.1080/03081070701499922},
researchr = {https://researchr.org/publication/Gottwald08-0},
cites = {0},
citedby = {0},
journal = {Int. J. General Systems},
volume = {37},
number = {1},
pages = {69-81},
}