Simpson, Thomas M. “Benson Mates, ‘Leibniz on Possible Worlds’, Logic, Methodology and Philosophy of Science III”. Crítica. Revista Hispanoamericana de Filosofía 4, no. 10 (January 9, 1970): 123–127. Accessed July 3, 2024. https://critica.filosoficas.unam.mx/index.php/critica/article/view/82.