ジョン・ベン
Venn, John (January 1876). “Consistency and Real Inference”. Mind 1 (1). http://fair-use.org/mind/1876/01/consistency-and-real-inference.
Venn, John (1881). Symbolic Logic. London: Macmillan and Company. ISBN 1-4212-6044-1
Venn, John (1880). “On the Employment of Geometrical Diagrams for the Sensible Representation of Logical Propositions”. Proceedings of the Cambridge Philosophical Society 4: 47–59.