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9Sandra Marquart-Pyatt, Pamela Paxton, "In Principle and in Practice: Learning Political Tolerance in Eastern and Western Europe" , Political Behavior, Vol. 29, No. 1, Mar. , 2007, pp. 89-113.
10Russell J. Dalton, Hans-Dieter Klingemann eds, The Oxford Handbook of Political Behavior, p. 325.
