1. D. Batens, A bridge between two-valued and many-valued semantic systems: n-tuple semantics, Proceedings of the XII International Symposium on Multiple-Valued Logic, IEEE Computer Science Press, 1982, pp. 318–322.
2. N. D. Belnap, A useful four-valued logic, Modern Uses of Multiple-Valued Logic (J. M. Dunn, ed.), D. Reidel Publishing, Boston, 1977, pp. 8–37.
3. J.-Y. Béziau, Universal Logic, Logica'94, Proceedings of the VIII International Symposium (T. Childers and O. Majers, eds.), Czech Academy of Science, Prague, CZ, 1994, pp. 73–93.
4. J.-Y. Béziau, Recherches sur la logique abstraite: les logiques normales, Acta Universitatis Wratislaviensis no. 2023, Logika 18 (1998), 105–114.
5. J.-Y. Béziau, Sequents and bivaluations, Logique et Analyse (N.S.) 44 (2001), no. 176, 373–394.