1. Conclusions and recommendations of the seminar Pompidou Group;Tunbridge,2004
2. H.P. Krüger, M.W. Bud Perrine, M. Mettke, F.B. Huessy, Illicit drugs in road traffic, Overview of the legal provisions, difficulties faced by police, and analysis of prevention attempts in selected European countries, P-PG/Circrout (98) 4 revCouncil of Europe, Pompidou Group, Strasbourg, 1999, pp. 1–29.
3. M.R. Möller, S. Steinmeyer, F. Aberl, Deliverable D3: operational, user and legal requirements across EU member states for roadside drug testing equipment: D3, in: Rosita Deliverables, Rosita Consortium, Gent, 1999, pp. 1–59.
4. Spin immunoassay of opiate narcotics in urine and saliva;Leute;J. Am. Med. Assoc.,1972
5. Detection of drugs in saliva of impaired drivers;Peel;J. Foren. Sci.,1984