1. Pavwelczyk A. EU Policy and Legislation on recycling of organic wastes to agriculture. International Society for Animal Hygiene 2005; 1.
2. United Nations Department of Economic and Social Affairs. World population projected to reach 9.7 billion by 2050. 2015; [Online]. Available: http://www.un.org/en/development/desa/news/population/2015-report.html. [Accessed 23 April 2017].
3. Food and Agriculture Organization of the United Nations. How to feed the world in 2050. 2009; [Online]. Available: http://www.fao.org/fileadmin/templates/wsfs/docs/expert_paper/How_to_Feed_the_World_in_2050.pdf. [Accessed 23 Apil 2017].
4. Climate change: Impact on agriculture and costs of adaptation;Nelson;Intl Food Policy Res Inst,2009
5. Closed-loop production systems—A sustainable supply chain approach;Winkler;CIRP Journal of Manufacturing Science and Technology,2011