1. The Reliability of Certification: Quality Labels as a Consumer Policy Tool
2. Inferring the Unknown: Enacting Organic Standards through Certification;Van der Kamp;Int. J. Sociol. Agric. Food,2013
3. Smallholder Group Certification. Training Curriculum for Producer Organizations;Lechleitner,2004
4. Regelungsmechanismen im System Ökologischer Landbau;Vogl,2016
5. Participatory Guarantee Systems—PGS;Källander,2008