1. Aznar, M.B.L.: Diagramas lógicos de Marlo para el razonamiento visual y heterogéneo: válidos en lógica matemática y aristotélica. University of Huelva, Spain (2020). http://rabida.uhu.es/dspace/handle/10272/19769
2. Boole, G.: An Investigation of the Laws of Thought, on which are Founded the Mathematical Theories of Logic and Probabilities. Dover, New York (1854)
3. Carroll, L.: The Game of Logic. Macmillan, London (1886)
4. De Rijk, L. M.: Logica Modernorum: the origin and early development of the theory of supposition, vol. 2. Van Gorcum, Assen (1967)
5. Descartes, R., Tweyman, S.: Meditations on First Philosophy: In Focus. Routledge, London (1993)