1. Biogas Energy;Abbasi,2012
2. Introduction to Biogashttp://rosalieforest.com/biogasworkshop-may4thv2.ppt
3. The Role of Waste-to-Energy in the Circular Economy,2017
4. Closing the Loop—An EU action plan for the Circular Economy,2015
5. The Role of Anaerobic Digestion and Biogas in the Circular Economy;Fagerström,2018