Reihe Trends in LogicG. Gerla × Fuzzy LogicMathematical Tools for Approximate ReasoningG. GerlaSpringer NetherlandeBook2013 Fuzzy LogicMathematical Tools for Approximate ReasoningG. GerlaSpringer NetherlandSoftcover2010 Fuzzy LogicMathematical Tools for Approximate ReasoningG. GerlaSpringer NetherlandHardcover2001