https://www.isaaa.org/resources/publications/briefs/52/download/isaaa-brief-52-2016.pdf

http://www.oecd.org/env/ehs/biotrack/safety-assessment-of-foods-and-feeds-derived-from-transgenic-crops-volume-2-9789264180338-en.htm

http://www.oecd.org/env/ehs/biotrack/safety-assessment-of-foods-and-feeds-derived-from-transgenic-crops-volume-1-9789264180147-en.htm

Here is a link from the European Food Safety Authority that may be useful http://www.efsa.europa.eu/en/topics/topic/genetically-modified-organisms.

Insightful references