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Jørgensen, Ulla; Hansen, Merete; Christensen, Lars P.; Jensen, Karina; Kaack, Karl (2000-05-12). "Olfactory and Quantitative Analysis of Aroma Compounds in Elder Flower (Sambucus nigra L.) Drink Processed from Five Cultivars". Journal of Agricultural and Food Chemistry. 48 (6): 2376–2383. doi:10.1021/jf000005f. ISSN0021-8561. PMID10888553.