Kovalev, V. B., T. I. Kozlik, L. V. Protsenko, A. V. Bober, and B. F. Kormiltsev. 2020. “Extending and Maintaining the in Vitro Collection of (inter)national Hop Varieties in Ukraine”. Agricultural Science and Practice 7 (3), 61-71. https://doi.org/10.15407/agrisp7.03.061.