Legal opinion on the protection of workers' representatives, p. 59, 2014-09-30 ([Internet, 2020-05-04](https://www.seco.admin.ch/dam/seco/de/dokumente/Arbeit/Internationale%20Arbeitsfragen/Legal_opinion_on_the_protection_workers_representatives.pdf.download.pdf/2015-legal%20opinion%20on%20the%20protection%20of%20workers%20representatives.pdf))