References
- [1] Grzegorz Bancerek, Czesław Byliński, Adam Grabowski, Artur Korniłowicz, Roman Matuszewski, Adam Naumowicz, Karol Pąk, and Josef Urban. Mizar: State-of-the-art and beyond. In Manfred Kerber, Jacques Carette, Cezary Kaliszyk, Florian Rabe, and Volker Sorge, editors, Intelligent Computer Mathematics, volume 9150 of Lecture Notes in Computer Science, pages 261–279. Springer International Publishing, 2015. ISBN 978-3-319-20614-1. doi:10.1007/978-3-319-20615-817.
- [2] Grzegorz Bancerek, Czesław Byliński, Adam Grabowski, Artur Korniłowicz, Roman Matuszewski, Adam Naumowicz, and Karol Pąk. The role of the Mizar Mathematical Library for interactive proof development in Mizar. Journal of Automated Reasoning, 61(1):9–32, 2018. doi:10.1007/s10817-017-9440-6.604425130069070
- [3] Agata Darmochwał. Calculus of quantifiers. Deduction theorem. Formalized Mathematics, 2(2):309–312, 1991.
- [4] Arend Heyting. Intuitionism. An introduction. Elsevier, Amsterdam, 3rd revised ed., 1971.
- [5] Takao Inoué. Intuitionistic propositional calculus in the extended framework with modal operator. Part I. Formalized Mathematics, 11(3):259–266, 2003.
- [6] Anne Sjerp Troelstra and Dirk van Dalen. Constructivism in mathematics. An introduction. Volume I, volume 121 of Studies in Logic and the Foundations of Mathematics. Amsterdam etc.: North-Holland, 1988. ISBN 0-444-70506-6.
- [7] Dirk van Dalen. Logic and Structure. London: Springer, 2013. ISBN 978-1-4471-4557-8; 978-1-4471-4558-5. doi:10.1007/978-1-4471-4558-5.