Shcherbakova, T. O., and V. F. Gorobets. 2021. “Phenological Features of the Growth and Development of Itoh Group Peony Cultivars in the Conditions of the M. M. Gryshko National Botanical Garden of the National Academy of Sciences of Ukraine”. Plant Varieties Studying and Protection 17 (1):14-20. https://doi.org/10.21498/2518-1017.17.1.2021.228202.