1. Atkinson MD, Atkinson E (2002) Sambucus nigra L. J Ecol 90(5):895–923. https://doi.org/10.1046/j.1365-2745.2002.00698.x
2. Badescu M, Badulescu O, Badescu L, Ciocoiu M (2015) Effects of Sambucus nigra and Aronia melanocarpa extracts on immune system disorders within diabetes mellitus. Pharmaceut Biol 53(4):533–539. https://doi.org/10.3109/13880209.2014.931441
3. Barak V, Halperin T, Kalickman I (2001) The effect of Sambucol, a black elderberry-based, natural product, on the production of human cytokines: I. Inflammatory cytokines. Eur Cytok Netw 12(2):290–296
4. Blumenthal MJIMC (1998) The Complete German Commission E Monographs. American Botanical Council, Austin
5. Blumenthal M, Goldberg A, Brinckmann J (2000) Herbal medicine. Expanded commission E monographs. Integrative Medicine Communications, Newton, USA