Theodore Hailperin
(2000)., Algebraical logic: Leibniz and Boole, in J. Gasser (ed.), A Boole anthology, Dordrecht, Springer, pp. 129-138.
(2000)., Boole's algebra isn't boolean algebra, in J. Gasser (ed.), A Boole anthology, Dordrecht, Springer, pp. 61-77.