Doing research for the book has required reading a wide number of publications. There is a growing number of reports on biogas projects in various parts of the world. The list below provides links to the sources of some of the best of these resources.

SANDEC (Department of Water and Sanitation in Developing Countries) part of EAWAG (Swiss Federal Institute of Aquatic Science and Technology): has several

Reports on  Indian food waste systems built by ARTI and Biotech Ltd in India and Africa.

The International Energy Authority (IEA) has a range of Tasks related to various subject areas. IEA Task  37 relates to Biogas and offers a wide range of reports and presentations from the group as a whole, as well as publications and reports from groups in the member countries.

SNV Netherlands Development Organisation has been involved in biogas projects in Nepal, Bangladesh and Vietnam, as well as other places. They have produced a wide range of reports on renewable energy, the list of which can be searched for those on biogas.

Links to more in formation on biogas can be found under Biogas Wikispaces. There is also a wikispace about Kingdom Bioenergy.

There is a Beginners Guide to Biogas run by Paul Harris of the University of Adelaide, Australia.