Witold Kosinski On Defuzzyfication of Ordered Fuzzy Numbers. 326-331 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3070&spage=326 2004 conf/icaisc/2004 ICAISC db/conf/icaisc/icaisc2004.html#Kosinski04