1. Commission Regulation (EC) N. 1493/199 of 17 May 1999, Off. J. Eur. Communities.
2. Commission Regulation (EC) N. 2244/2002 of 16 December 2002, amending Regulation (EC) N. 1622/2000 as regards the use of tartaric acid in wine products, Official Journal of the European Communities, L341/27, 17.12.2002.
3. In Isotope Hydrology. IAEA: Vienna, 1984; 105-122.
4. The ratios of sap in trees: Implications for water sources and tree ring ratios