Richard Zuber Some properties of intercategorial entailment. [Citation Graph (0, 0)][DBLP] Electr. Notes Theor. Comput. Sci., 2003, v:84, n:, pp:- [Journal]
Richard Zuber Symmetric and contrapositional quantifiers. [Citation Graph (0, 0)][DBLP] Journal of Logic, Language and Information, 2007, v:16, n:1, pp:1-13 [Journal]