From Citizendium, the Citizens' Compendium
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- Anthony William Fairbank Edwards (2004). Cogwheels of the mind: the story of Venn diagrams. JHU Press. ISBN 0801874343. A delightful discussion of Venn diagrams with an emphasis upon the geometrical patterns they create.
- Sun-Joo Shin (1996). “Chapter IV: Situation-theoretic account of valid reasoning with Venn diagrams”, Gerard Allwein, Jon Barwise, editors: Logical reasoning with diagrams. Oxford University Press, pp. 81 ff. ISBN 0195104277. The author attempts to show that Venn diagrams are not just heuristic tools for discovering proofs, but can be made rigorous tools by developing a formal syntax and semantics.