D. A. M. Barrington, R. Beigel, and S. Rudich. Representing Boolean functions as polynomials modulo composite numbers. Comput. Complexity, 4:367-382, 1994. Appeared also in Proc. 24th Ann. ACM Symp. Theor.\ Comput., 1992.
 D. A. M. Barrington, H. Straubing, and D. Thérien. Non-uniform automata over groups. Information and Computation, 89:109-132, 1990.
 V. Grolmusz. On set systems with restricted intersections modulo a composite number. In Lecture Notes in Computer Science Vol. 1276, pages 82-90, August 1997. Presented at COCOON'97, Shanghai, China.
 G. Tardos and D. A. M. Barrington. A lower bound on the MOD 6 degree of the OR function. In Proceedings of the Third Israel Symosium on the Theory of Computing and Systems (ISTCS'95), pages 52-56, 1995.