1. ISO 17025 (2005) General requirements for the competence of testing and calibration laboratories
2. EN 45001 (1989) General requirements for the competence of testing and calibration laboratories
3. Rauret G, Compañó R (2000) Quím Anal 19:103–109
4. Rauret G, Compañó R (2003) Mikrochim Acta 142:177
5. Compañó R et al (2002) Quality management in teaching laboratories Publications UB. ( http://www.publicacions.ub.es )