Bibliography
Codices Boethiani, 'A Conspectus of manuscripts of the works of Boethius II', ed. by Smith Lesley, London-Turin 2001, p. 204-205.
Westerstahl, Dag, 2012. 'Classical vs modern Squares of Opposition, and beyond', in Jean-Yves Beziau & Gillman Payette (eds.), The Square of Opposition: A General Framework for Cognition, Bern: Peter Lang.
