Sydora, N. V., A. M. Kovalyova, and I. A. Danylova. “Determination of the Quantitative Content of Procyanidins in Hawthorn Fruits”. Journal of Organic and Pharmaceutical Chemistry, vol. 16, no. 4(64), Dec. 2018, pp. 48-51, doi:10.24959/ophcj.18.955.