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    • Studies in paraconsistent logic ii: quantifiers and the unity of opposites 

      Costa, Newton C.A. da; Wolf, Robert G.
      In this paper, the propositional logics introduced in a previous work (N.C.A. da Costa and R.G. Wolf, Studies in paraconsistent logic I: the dialectical principle of the unity of opposites, Philosophia 9(1980) ,pp.189-217) ...
      Universidad Nacional de Colombia Revistas electrónicas UN Revista Colombiana de Matemáticas.