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Benzmüller, Christoph; Lawrence C. Paulson; Frank Theiss; Arnaud Fietzke (2008). "LEO-II – A Cooperative Automatic Theorem Prover for Classical Higher-Order Logic (System Description)". Automated Reasoning(PDF). Lecture Notes in Computer Science. Vol. 5195. Springer. pp. 162–170. doi:10.1007/978-3-540-71070-7_14. ISBN978-3-540-71069-1. Archived from the original(PDF) on 15 June 2011. Retrieved 20 December 2009.
Benzmüller, Christoph; Lawrence C. Paulson; Frank Theiss; Arnaud Fietzke (2008). "LEO-II – A Cooperative Automatic Theorem Prover for Classical Higher-Order Logic (System Description)". Automated Reasoning(PDF). Lecture Notes in Computer Science. Vol. 5195. Springer. pp. 162–170. doi:10.1007/978-3-540-71070-7_14. ISBN978-3-540-71069-1. Archived from the original(PDF) on 15 June 2011. Retrieved 20 December 2009.