1. Detection of apple juice concentrate in the manufacture of natural and sparkling cider by means of HPLC chemometric sugar analyses;Blanco;J. Agric. Food Chem.,2004
2. Ministerial Order of 1 August 1979 (BOE of 28 August), approving the rules for cider and other drinks derived from apples
3. E.C. Regulation No 2081/92/EEC and 2082/92/EEC of 14 July 1992 'on the protection of geographical indications and designations of origin for agricultural products and foodstuffs' and 'on certificates of specific character for agricultural products and foodstuffs'
4. Council regulation (EEC) Nº 2081/92 'Sidra de Asturias' Nº CE: ES/00260/28.10.2002 PDO
5. Determination of stable isotope ratios in food analysis;Rossman;Food Rev. Int.,2001