Paul Erdőos, Vance Faber, and Jean Larson Sets of natural numbers of positive density and cylindric set algebras of dimension 2. Algebra universalis, vol. 12 (1981), pp. 81–92. - Jean A. Larson The number of one-generated diagonal-free cylindric set algebras of finite dimension greater than two. Algebra universalis, vol. 16 (1983), pp. 1–16. - Jean A. Larson The number of finitely generated infinite cylindric set algebras of dimension two. Algebra universalis, vol. 19 (1984), pp. 377–396. - Jean A. Larson The number of one-generated cylindric set algebras of dimension greater than two. The journal of symbolic logic, vol. 50 (1985), pp. 59–71.