1. Europeans’ Attitudes Towards Food Security, Food Quality and the Countryside 2012http://ec.europa.eu/public_opinion/archives/ebs/ebs_389_en.pdf
2. Europeans, Agriculture and the Common Agricultural Policy (CAP) 2014http://ec.europa.eu/public_opinion/archives/ebs/ebs_410_en.pdf
3. Europeans, Agriculture and the CAP 2016https://www.google.com.hk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjl3eXu4cfrAhUlGaYKHRT0DDEQFjAAegQIAxAB&url=http%3A%2F%2Fec.europa.eu%2FCOMMFrontOffice%2FPublicOpinion%2Findex.cfm%2FResultDoc%2Fdownload%2FDocumentKy%2F69756&usg=AOvVaw2gqUNtyndysnLJ2HiCd96s
4. Europeans, Agriculture and the CAP 2018https://ec.europa.eu/commfrontoffice/publicopinion/index.cfm/ResultDoc/download/DocumentKy/82123
5. Data on Organic Agriculture in Europehttps://statistics.fibl.org/europe.html