Ткаченко, В.М., Андрющенко, А.В., Барбан, О.Б. and Сіжук, А.П. 2015. Solving the issues in studying the soil cover at the institutions for plant varieties examination. Plant varieties studying and protection. 1-2(26-27) (Jun. 2015), 4–10. DOI:https://doi.org/10.21498/2518-1017.1-2(26-27).2015.55824.