1. Batra, R., & Pattanaik, P. K. (1972). On some suggestions for having non-binary social choice functions. Theory and Decision, 3, 1–11.
2. Davidson, D. (1986). Judging interpersonal interests. In J. Elster & A. Hylland (Eds.), Foundations of social choice theory. Cambridge: Cambridge University Press.
3. Dummett, M. (1984). Voting procedures. Oxford: Clarendon Press.
4. Elster, J., & Hylland, A. (Eds.). (1986). Foundations of social choice theory. Cambridge: Cambridge University Press.
5. Levi, I. (1986). Hard choices. Cambridge: Cambridge University Press.