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 Naive Set Theory by Paul R. Halmos, March, 1987
 Mathematical Thinking and Writing: A Transition to Advanced Mathematics by Randall Maddox, July, 2001
 A First Course in Fuzzy Logic, Second Edition by Hung T. Nguyen, Elbert A. Walker, 21 July, 1999
 Proof, Logic, and Conjecture: The Mathematician's Toolbox by Robert S. Wolf, January, 1998
 The Fuzzy Systems Handbook: A Practitioner's Guide to Building, Using, & Maintaining Fuzzy Systems by Earl Cox, 15 January, 1999
 Notes on Logic and Set Theory by Peter T. Johnstone, November, 2002
 Set Theory and Its Logic Rev Edition by Willard Van O Quine,
 Uncertain RuleBased Fuzzy Logic Systems: Introduction and New Directions by Jerry M. Mendel, 22 December, 2000
 The Structure of Proof: With Logic and Set Theory by Michael L. O'Leary, 15 January, 2002
