On Hesitation Degrees in IF-Set Theory.

Anna Pankowska Maciej Wygralak On Hesitation Degrees in IF-Set Theory. 338-343 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3070&spage=338 2004 conf/icaisc/2004 ICAISC db/conf/icaisc/icaisc2004.html#PankowskaW04