European Commission
International Energy Agency
European Environment Agency
European biomass associatioт (Bioenergy Europe)
World bioenergy association
European renewable energies federation
US Environmental Protection Agency
German Energy Agency
Austrian Energy Agency
Netherlands Enterprise Agency (RVO) 
The German Renewable Energy Federation BEE (Bundesverband Erneuerbare Energie e.V.)
German BioEnergy Association (BBE)
German Biogas Association
Renewable energy association (UK)
European Biomass Industry Association
European Biogas Association
Swedish Bioenergy Association
The Canadian Bioenergy Association
Netherlands Bioenergy Association
Danish Bioenergy Association
Polish Biomass Association
Biogas Association (CANADA)
The Anaerobic Digestion & Biogas Association
Czech Biogas Association
Hungarian Biogas Association
Finnish Biogas Association
Danish Biogas Association