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           _    _    _    _      ___      ______  
    ___   | || | || | || | ||   / _ \\   /_   _// 
   /   || | || | || | || | ||  / //\ \\  `-| |,-  
  | [] || | \\_/ || | \\_/ || |  ___  ||   | ||   
   \__ ||  \____//   \____//  |_||  |_||   |_||   
    -|_||   `---`     `---`   `-`   `-`    `-`'   
     `-`

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Text this: 50 years of fuzzy sets: Preface