1. The Minnesota Project. Anaerobic digesters farm opportunities and pathways. [accessed January 2012].
2. Burns RT. Status of manure anaerobic digestion in the United States. In International conference on 21st century challenges to sustainable agri-food systems: biotechnical, environment, nutrition, trade and policy, 15th–17th March; 2007.
3. Lusk P. Methane recovery from animal manures. the current opportunities casebook; 1998. [accessed January 2011].
4. AgSTAR. Operating anaerobic digester projects; 2012. [accessed May 2012].
5. Bio-Terre Systems Inc., Péloquin Farm 5000hogs/year; 2012. [accessed May 2012].