Улич, Л. І., Г. М. Каражбей, С. М. Гринів, and В. М. Матус. “Importance and Use of Morphological Characteristics of Blackberry (Vaccinium Corymbosum L.) in the Course of DUS”. Plant Varieties Studying and Protection, no. 2(14), July 2011, pp. 72-77, doi:10.21498/2518-1017.2(14).2011.60467.