1. Birkenberg AS (2017) The potential of certification for climate change mitigation in the agri-food sector – a case study of carbon neutral certified coffee from Costa Rica Dissertation 183
2. BSI (2010) PAS 2060:2010 Specification for the demonstration of carbon neutrality
3. BSI (2014) PAS 2060:2014 Specification for the demonstration of carbon neutrality
4. Carbon Clear (2011) White paper: PAS 2060, the first standard for carbon neutrality
5. Carbon Market Watch (2019) Carbon markets 101: the ultimate guide to global offsetting mechanisms, pp 1–12