1. Abate, P.: Tableaux work bench (twb) – User Manual (2003), http://arp.anu.edu.au/~abate/twb
2. Lecture Notes in Computer Science;R. Bornat,1997
3. Chailloux, E., Manoury, P., Pagano, B.: Développement d’applications avec Objective Caml. O’Reilly, Sebastopol (2000)
4. Lecture Notes in Artificial Intelligence;L. Fariñas del Cerro,2001
5. Fitting, M.: Proof Methods for Modal and Intuitionistic Logics. Synthese Library, vol. 169, D. Reidel, Dordrecht (1983)