- Schömann, I. (2022). Collective bargaining and the limits of competition law: Protecting the fundamental labour rights of self-employed workers. Policy Brief No. 1, January, ETUI, Brussels.
- ETUI. (2015). Trade Unions. By L. Fulton (Labour Research Department, London). ETUI.
- ETUI. (2015). Collective bargaining. By L. Fulton (Labour Research Department, London). ETUI.
- Schömann, I., Jagodzinski, R., Boni, G., Clauwaert, S., Glassner, V. and Jaspers, T. (2012). Transnational collective bargaining at company level. A new component of European industrial relations? October, ETUI, Brussels.
- ETUI. (2011). Trade unions - Poland (2011). ETUI.
- ETUI. (2010). Austrian union information. ETUI.