1. Bell, N. R. (1968). A map method for the teaching of the fundamental concepts of compound-input logic circuits. IEEE Transactions on Education, E-11(3), 173-177.
2. Brown, F. M. (1975). The constrained-input problem. IEEE Transactions on Computers, C-24(1), 102-106.
3. Brown, F. M. (1990). Boolean reasoning: the logic of Boolean equations. Kluwer Academic Publishers, Boston, USA.
4. Brown, S. D., & Vranesic, Z. (2014). Fundamentals of digital logic with Verilog design. Third Edition, McGraw-Hill, New York, NY, USA.
5. Ledley, R. S. (1960). Digital computer and control engineering. McGraw-Hill, New York, NY, USA.