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2. Anderson, A.R. and Belnap, N.D., 1975. Entailment: the logic of relevance and necessity, vol. I, Princeton, Princeton University Press.
3. Ashworth, E. J., 1974. Language and Logic in the Post-Medieval Period, Dordrecht, D. Reidel.
4. Bäck, A., 1996. Reduplicatives, Leiden, Brill.
5. Bendiek, J., 1952. “Die Lehre von den Konsequenzen bei Pseudo-Scotus,” Franzikanischer Studien 34, 205–34.