1. Adel, M.A. (2021). Features of Propositional Logic, Pure Mathematical Sciences, 10(1), 35 – 44. https://doi.org/10.12988/pms.2021.91275
2. Aziz, F. & Kazi, A. (2019). Role of Teachers in Students’ Classroom Participation in Universities, International Journal of Educational Enquiry and Reflection, 4(1), 46-57.
3. Dvornichenko, A.V. & Lysenko, O.V. (2022). Discrete Mathematics and Theory of Algorithms : lecture notes : in four parts / compilers (Part I), Sumy : Sumy State University, 1 — 275.
4. Hugo, B., Gerrit, R., Cor S. & Martin G. (2020). Logical Reasoning in Formal and Everyday Reasoning Tasks, International Journal of Science and Mathematics Education, 18: 1673–1694. https://doi.org/10.1007/s10763-019-100398
5. Ibrahim, R.A. & Kazeem, R.A. (2015). Logic Circuit I & II; Essential Computer Studies for Senior Secondary School (1st Ed.). Tonad Publishers Limited, ISBN 978 – 978 – 52654 – 6 – 0. 229 – 236.