N. Szabó, B. Z. Sipos, and É. Stefanovits-Bányai, “Antioxidant capacity, C-vitamin and anthocyanils content in the fruits of elderberry (Sambucus nigra L.) types”, Int. j. hortic. sci., vol. 10, no. 3, pp. 77–79., Aug. 2004, doi: 10.31421/IJHS/10/3/524.