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2. A Lijphart, Patterns of democracy (New Haven, CT, 1999).
3. S Merrill and B Grofman, A unified theory of voting (Cambridge, 1999).

4. F Abeles, C L Dodgson and apportionment for proportional representation, Gadnita Bharati 3 (3-4) (1981), 71-82.
5. P Crépel, Le dernier mot de Condorcet sur les élections, Math. Inform. Sci. Humaines No. 111, (1990), 7-43.
6. I McLean, The Borda and Condorcet principles : three medieval applications, Soc. Choice Welf. 7 (2) (1990), 99-108.
7. N Schofield, Constitutions, voting and democracy : a review, Soc. Choice Welf. 18 (3) (2001), 571-600.
8. H P Young, Condorcet's theory of voting, Math. Inform. Sci. Humaines No. 111 (1990), 45-59.

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