Silvana Badaloni Marco Falda Massimiliano Giacomin Computational Complexity Study of Fuzzy Qualitative Temporal Algebra. 1-5 2007 FUZZ-IEEE http://dx.doi.org/10.1109/FUZZY.2007.4295616 conf/fuzzIEEE/2007 db/conf/fuzzIEEE/fuzzIEEE2007.html#BadaloniFG07