Yaroslav Shramko Heinrich Wansing Hyper-Contradictions, Generalized Truth Values and Logics of Truth and Falsehood. 403-424 2006 15 Journal of Logic, Language and Information 4 http://dx.doi.org/10.1007/s10849-006-9015-0 db/journals/jolli/jolli15.html#ShramkoW06