1. Reasoning with logical bilattices;Arieli;J. Log. Lang. Inf.,1996
2. The value of the four values;Arieli;Artif. Intell.,1998
3. Software tool support for modular reasoning in modal logics of actions;Balco,2018
4. How a computer should think;Belnap,1977
5. A useful four-valued logic;Belnap,1977