- Goritz, Alexandra, Nina Kolleck, and Helge Jörgens. 2019. Analyzing Twitter Data: Advantages and Challenges in the Study of UN Climate Negotiations. Sage Research Methods Cases Part 2. London: Sage.
- Schuster, Johannes, Helge Jörgens, and Nina Kolleck. 2019. Using Social Network Analysis to Study Twitter Data in the Field of International Agreements. Sage Research Methods Cases Part 2. London: Sage.
- Jörgens, Helge, Nina Kolleck, and Barbara Saerbeck. 2016. Exploring the Hidden Influence of International Treaty Secretariats: Using Social Network Analysis to Analyse the Twitter Debate on the ‘Lima Work Programme on Gender’. Journal of European Public Policy 23 (7):979–998.
Introdução à Análise das Políticas Públicas 