Volume 80, Number 1, June 2005
: Under Carnap's Lamp: Flat Pre-semantics.
: The Shaping of Deduction in Greek Mathematics: A Study in Coginitive History.
Volume 80, Number 2-3, August 2005
: A Non-deterministic View on Non-classical Negations.
: Dual Intuitionistic Logic and a Variety of Negations: The Logic of Scientific Research.
: Nelson's Negation on the Base of Weaker Versions of Intuitionistic Negation.