1. World Health Organisation, [Tackling antibiotic resistance from a food safety perspective in Europe], WHO Library (2011), ISBN 978 92 890 1422 9, http://www.euro.who.int/__data/assets/pdf_file/0005/136454/e94889.pdf (accessed in 8th July 2017)
2. World Health Organisation, [Antimicrobial resistance: global report on surveillance], WHO Library (2014) http://apps.who.int/iris/bitstream/10665/112642/1/9789241564748_eng.pdf?ua=1……(accessed in 8th July 2017)
3. European Medicines Agency, [Veterinary Medicines Division. Sales of veterinary antimicrobial agents in 26 EU/EEA countries in 2013] 5th ESVAC report (2015) (accessed in 8th July 2017) http://www.ema.europa.eu/docs/en_GB/document_library/Report/2015/10/WC500195687.pdf
4. Wilson and Gisvold’s textbook of organic medicinal and pharmaceutical chemistry;Beale,2011
5. Current trends in green liquid chromatography for the analysis of pharmaceutically active compounds in the environmental water compartments