Budak, N. H., F. Ozçelik, and Z. B. Güzel-Seydim. “Antioxidant Activity and Phenolic Content of Apple Cider”. Turkish Journal of Agriculture - Food Science and Technology, vol. 3, no. 6, Feb. 2015, pp. 356-60, doi:10.24925/turjaf.v3i6.356-360.265.