1. European Commission. Commission implementing Regulation (EU) n 1274/2011 of 7 December 2011 concerning a coordinated multiannual control program of the Union for 2012, 2013 and 2014 to ensure compliance with maximum residue levels of pesticides and to assess the consumer exposure to pesticide residues in and on food of plant and animal origin. Official Journal of the European Union 08.12.2011, L325/24
2. European Council. Regulation (EC) No 396/2005 of the European Parliament and of the Council of 23 February 2005 on maximum residue levels of pesticides in or on food and feed of plant and animal origin and amending Council Directive 91/414/EEC. Official Journal of the European Union 16.03.2005, L70/1
3. European Council. Commission Regulation (EC) n. 149/2008 of 29 January 2008 amending regulation (EC) n. 396/2005 of the European Parliament and of the Council by establishing Annexes II, III and IV setting maximum residue levels for products covered by Annex I thereto. Official Journal of the European Union 01.03.2008, L58/1
4. European Parliament and Council. Regulation (EC) n. 882/2004 of the European Parliament and of the Council of 29 April 2004 on official controls performed to ensure the verification of compliance with feed and food law, animal health and animal welfare rules. Official Journal of the European Union 30.4.2004, L165/1
5. Regular participation in proficiency testing provides long term improvements in laboratory performance: an assessment of data over time