Engines of logic : mathematicians and the origin of Computer / Martin Davis. - Davis, Martin, 1928- (OLS)http://pul/name/48980 (Norton & Company, 2001)
Bibliografia in nota.

Naturaleza y ser en la escolastica y en Nicolas de Cusa / Carlos Valverde. - Valverde, Carlos. (OLS)http://pul/name/37333 (Società editrice Vita e pensiero, 1966)
IAR: CF.175