Periodicals>Journal Article:  Eenennaam, A. L. Van and Young, A. E. , Prevalence and impacts of genetically engineered feedstuffs on livestock populations, Journal of Animal Science, Retrieved on 2014-10-17

Source Material [www.journalofanimalscience.org]

Proceedings of Meetings and Symposia>Speech:  Lynas, Mark (20120103), Lecture to the Oxford Farming Conference, Retrieved on 2013-01-04

Source Material [www.marklynas.org]