- Author: Christian Davenport Carol Mueller Hank Johnston
- Language: English
- Year: 2005
- Author: Donatella Della Porta
- Language: English
- Year: 2006
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- Language: English
- Year: 1994
- Author: Hanspeter Kriesi, et al
- Language: English
- Year: 1995
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- Language: English
- Year: 1995
- Author: Sanjeev Khagram James V. Riker Kathryn Sikkink
- Language: English
- Year: 2002
- Author: Rory McVeigh
- Language: English
- Year: 2009