1. Solutions to congruences using sets with the property of Baire;Dougherty, Randall;J. Math. Log.,2001
2. W. Magnus, A. Karrass, and D. Solitar, Combinatorial group theory, Interscience, New York, 1966.
3. Studies in Logic and the Foundations of Mathematics;Moschovakis, Yiannis N.,1980
4. The Banach-Tarski paradox for the hyperbolic plane;Mycielski, Jan;Fund. Math.,1989