1. J. Eldon Whitesitt (2010). Boolean Algebra and Its Applications. Dover Publications, Inc, New York.
2. Schneeweiss, Winfried G. ( 1989). Boolean Functions With Engineering Applications and Computer Programs. Springer-Verlag. Berlin-Heidelberg.
3. M.V. Subramanyam (2005). Switching Theory and Logic Design. Laxmi Publications Ltd. New Delhi.
4. Yves Crama, Peter L. Hammer (2011). Boolean Functions: Theory, Algorithms, and Applications. Cambridge University Press. New York.
5. https://en.wikipedia.org/wiki/canonical_normal_form