1. The limits to growth;DH Meadows,1972
2. “Statistical Pocketbook, World food and agriculture",2015
3. Alexandratos N, Bruinsma J. World agriculture towards 2030/2050: the 2012 revision. ESA Working paper. 2012;12: 03 http://www.fao.org/fileadmin/templates/esa/Global_persepctives/world_ag_2030_50_2012_rev.pdf
4. Building resilience for peace and food security,2017
5. Alltech. 7 insights from Alltech’s 7th Annual Global Feed Survey. 05 January 2018. https://go.alltech.com/alltech-feed-survey?utm_campaign=2018%20Global%20Feed%20Survey&utm_medium=email&_hsenc=p2ANqtz-91HGvoDc3AMw-c2cnJXayUZRhiFSwK1CTXHFw_PhnMHIQZKIWp_SO4D_GdRT0JB3l0E89TZnCJJJeuQuNf4FQ280YHGw&_hsmi=60242964&utm_content=60242964&utm_source=hs_email&hsCtaTracking=e3145daf-3bca-43fd-89ed-5fba27b8a497%7C3b56cf5e-9c3a-4878-82c2-7fde3862fd25