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↑Umberto Quattrocchi:CRC World Dictionary of Medicinal and Poisonous Plants: Common Names, Scientific Names, Eponyms, Synonyms, and Etymology (5 Volume Set).CRC Press,2012,s.3563. ISBN978-1-4200-8044-5.(ang.).
↑Peter Hanelt, Institute of Plant Genetics and Crop Plant Research, W. Kilian:Mansfeld's Encyclopedia of Agricultural and Horticultural Crops.Springer Science & Business,2001,s.167. ISBN978-3-540-41017-1.(ang.).