Errors Due to Overflow in Arithmetic Operations Particularly as Regards FINAC Electronic Computer. - Paolo Ercoli; Roberto Vacca (J. ACM, 1957)

A three-valued system of logic and its application to base three digital circuits. - Roberto Vacca (IFIP Congress, 1959)

Binary Arithmetic for Discretely Variable Word Length in a Serial Computer. - Paolo Ercoli; Roberto Vacca (Commun. ACM, 1959)