1. EU. Climate action – EU greenhouse gas emissions and targets; 2014. .
2. EU. 2030 framework for climate and energy policies; 2014. .
3. WRAP. Waste protocols project – anaerobic digestate; 2009.
4. Växtkraft – process description of the biogas plant in Västerås; 2006.
5. The use of anaerobically digested slurry combined with natural zeolite for rapeseed production;Kocar;Energy Educ Sci Technol Part A: Energy Sci Res,2012