1. European Council Directive (2014) 2013/59/Euratom on basic safety standards for protection against the dangers arising from exposure to ionising radiation and repealing directives 89/618/Euratom, 90/641, 97/43 Euratom and 2003/122/Euratom. Official Journal of the European Union 57(L13):1–73
2. European Commission Guidelines on Clinical Audit for Medical Radiological Practice (Diagnostic Radiology, Nuclear Medicine and Radiotherapy) (2010) Radiation Protection Directive No. 159. ISSN 1681–6803
3. European Society of Radiology (ESR) (2018) The ESR Audit Tool (Esperanto): Genesis, Contents and Pilot. Insights Imaging 9(6):899–903
4. ESR Esperanto 2019 – the ESR Guide to Clinical audit and Clinical Audit Tool. https://www.myesr.org/media/3805.
5. ESR (2018) EuroSafe Imaging Call for Action. https://www.myesr.org/media/659.