Jonathan Lawry Inés González Rodríguez Generalised Label Semantics as a Model of Epistemic Vagueness. 626-637 2009 ECSQARU http://dx.doi.org/10.1007/978-3-642-02906-6_54 conf/ecsqaru/2009 db/conf/ecsqaru/ecsqaru2009.html#LawryR09