1. K. Arrow, Social Choice and Individual Values, Yale University Press (1963).
2. F. T. Aleskerov, Arrovian Aggregation Models, Springer, New York (1999).
3. V. G. Bodnarchuk, L. A. Kaluzhnin, V. N. Kotov, and B. A. Romov, “Galois theory for Post algebras, I,” Kibernetika, 3, 1–10 (1969).
4. V. G. Bodnarchuk, L. A. Kaluzhnin, V. N. Kotov, and B. A. Romov, “Galois theory for Post algebras, II,” Kibernetika, 5, 1–9 (1969).
5. P. M. Cohn, Universal Algebra, Harper and Row, New York–Evanston–London: (1965).