@inproceedings{Dombi1999DeMorgan,
author={J. Dombi},
title={De Morgan Class and Negation},
booktitle={Proc. EUROFUSE - SIC'99 The 4th meeting of the EURO Working Group on Fuzzy Sets and The 2nd
International Conference on Soft and Intelligent Computing, Budapest, Hungary},
year={1999},
pages={335--344}
}