1. Official Journal of the European Communities. Council Regulation (EEC) No. 1576/89 laying down general rules on the definition, description and presentation of spirit drinks, No L160, 1–17.
2. Preliminary draft of the Commission Regulation (EC) laying down Community methods for the analysis of spirit drinks. Annex (Rev. 7, June 1997).
3. Council Directive 85/591/EEC of 20 December 1985 concerning the introduction of methods of analysis and sampling for the monitoring of foodstuffs intended for human consumption.
4. The international harmonized protocol for the proficiency testing of (chemical) analytical laboratories (Technical Report)
5. W. Horwitz (Ed.), Protocol for the design, conduct and interpretation of method-performance studies, Pure Appl. Chem. 67 (1995) 331.