Hudz, N. ., R. . Ivanova, J. . Brindza, O. . Grygorieva, Z. . Schubertová, and E. . Ivanišová. “Approaches to the Determination of Antioxidant Activity of Extracts from Bee Bread and Safflower Leaves and Flowers”. Potravinarstvo Slovak Journal of Food Sciences, vol. 11, no. 1, July 2017, pp. 480-8, doi:10.5219/786.