Tibor Lukic Natasa Sladoje Joakim Lindblad Deterministic Defuzzification Based on Spectral Projected Gradient Optimization. 476-485 2008 DAGM-Symposium http://dx.doi.org/10.1007/978-3-540-69321-5_48 conf/dagm/2008 db/conf/dagm/dagm2008.html#LukicSL08