Vidic, Danijela, et al. “Determination of Total Phenolic Content and Antioxidant Activity of Ethanol Extracts from Aloe Spp”. Bulletin of Chemists and Technologists of Bosnia and Herzegovina, vol. 42, June 2014, pp. 5-10, https://glashem.pmf.unsa.ba/index.php/bctbh/article/view/119.