Ivan Kramosil Partial Lattice-Valued Possibilistic Measures and Some Relations Induced by Them. 395-406 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2711&spage=395 2003 conf/ecsqaru/2003 ECSQARU db/conf/ecsqaru/ecsqaru2003.html#Kramosil03