1. ISO, IEC 17043 (2010) Conformity assessment—general requirements for proficiency testing. ISO, Geneva
2. Brookman Brian, Bulska Ewa, Butler Owen, Koch Michael, Noblett Tracey, van Putten Kees, Robouch Piotr (2012) Proficiency testing in analytical chemistry, microbiology and laboratory medicine: working discussions on current practice and future discussions. Accred Qual Assur 17:451–455