Nadaroglu, Hayrunnisa, et al. “Antioxidant and Radical Scavenging Activities of Capsules of Caper (Capparis Spinosa)”. Asian Journal of Chemistry, vol. 21, no. 7, Mar. 2010, pp. 5123-34, https://asianpubs.org/index.php/ajchem/article/view/18280.