Brams, S. J., & Nagel, J. H. (1991). Approval voting in practice. Public Choice, 71(1), 1–17.
Duverger, M. (1959). Political parties: Their organization and activity in the modern state. Metheun & Co. Ltd.
Green-Armytage, J., Nicolaus, T. T., & Cosman, R. (2016). Statistical evaluation of voting rules. Social choice and welfare, 46(1), 183–212.
Nicolaus TT., & Plassmann, F. (2010) The structure of the election-generating universe.
Nicolaus Tideman, T. (1987). Independence of clones as a criterion for voting rules. Social Choice and Welfare, 4(3), 185–206.
Schulze, M. (2003). A new monotonic and clone-independent single-winner election method. Voting matters, 17(1), 9–19.