1. Secretariat of the Joint FAO/WHO Food Standards Programme Understanding the CODEX Alimentarius ftp://ftp.fao.org/codex/Publications/understanding/Understanding_EN.pdf
2. FAO (Food and Agriculture Organization of the United Nations) Codex Procedural Manual ftp://ftp.fao.org/codex/Publications/ProcManuals/Manual_23e.pdf
3. FAO/WHO Codex Committee on Residues of Veterinary Drugs in Food http://www.fao.org/fao-who-codexalimentarius/committees/committee/en/?committee=CCRVDF
4. FAO (Food and Agriculture Organization of the United Nations) Maximum residue limits (MRLs) and risk management recommendations (RMRs) for residues of veterinary drugs in foods CAC/MRL 2-2015 http://www.codexalimentarius.org/download/standards/45/MRL2_2015e.pdf
5. Codex Committee on Residues of Veterinary Drugs in Food, Veterinary Drug Residue Maximum Residue Limits http://www.fao.org/fao-who-codexalimentarius/standards/veterinary-drugs-mrls/en/