1. Alaimo A. (2012). Transnational company agreements and sectoral social dialogue: parallel lines, no convergence? In: Leonardi S., ed., Final Report EUROATCA. European Action on Transnational Company Agreements: a stepping stone towards a real internationalization of industrial relations?. -- Testo disponibile al sito: https://www.fondazionedivittorio.it/sites/default/files/content-attachment/02_2012_EUROACTA-1_0.pdf (consultato il 1°.2.2019), 54 ss.
2. Ales E. (2007). La contrattazione collettiva transnazionale tra passato, presente e futuro. DLRI: 541 ss.
3. Ales E. (2018). Transnational collective agreements: the role of trade unions and employers’ association. -- Testo disponibile al sito: https://eu.eventscloud.com/file_uploads/185fe09c1a16e079ad008e8927fc6c8a_Ales_Final_EN3.pdf (consultato il 1°.2.2019).
4. Ales E., Dufresne A. (2012). Transnational collective bargaining: Another (problematic) fragment of the European multi-level industrial relations system. EJIR: 95 ss.
5. Ales E., Engblom S., Jaspers T., Laulom S., Sciarra S., Sobczak A., Valdés Dal-Ré F. (2006). Final Report. Transnational collective bargaining: past, present and future. Report commissioned by European Commission Directorate General Employment, Social Affairs and Equal Opportunities. Unit D2.