J. L. Speranza

Speranza, J. L., and Laurence Horn. 2012. “History of Negation.” In Handbook of the History of Logic. Volume 11. Logic: A History of Its Central Concepts, edited by Dov M. Gabbay, Francis Jeffry Pelletier, and John Woods, 127–173. Amsterdam: North-Holland. (1 diagram)

Speranza, J. L., and Laurence Horn. 2010. “A Brief History of Negation.” Journal of Applied Logic 8 (3): 277–301. (1 diagram)