1. Beurteilungskriterien: Urteilsbildung in der Medizinisch-Psychologischen Fahreignungsdiagnostik 2. Aufl;Schubert,2009
2. Recommendations for hair testing in forensic cases;Society of Hair Testing;Forensic Sci. Int.,2004
3. Substance Abuse and Mental Health Services Administration (SAMHSA), Mandatory Guidelines for Federal Workplace Drug Testing Programs. Draft #4, 2001, http://www.workplace.samhsa.gov/ResourceCenter/Dt/FA/GuidelinesDraft4.html (accessed 12/09/2010).
4. Guidelines for European workplace drug and alcohol testing in hair;Agius;Drug Test. Anal.,2010
5. Society of Forensic and Toxicological Chemistry (GTFCh), Richtlinien der GTFCh zur Qualitätssicherung bei forensisch-toxikologischen Untersuchungen, 2009, https://www.gtfch.org/cms/files/GTFCh_Richtlinie_For-Tox_Version%201.pdf (accessed 12/09/2010).