RT Article T1 Protest event analysis JF Methods of social movement research SP 231 OP 259 A1 Koopmans, Ruud 1961- A2 Rucht, Dieter 1946- LA English YR 2002 UL https://krimdok.uni-tuebingen.de/Record/1525791222 SN 9780816635955 K1 Soziale Bewegungen