Лещук, Н. В., В. В. Хареба, О. В. Позняк, and О. В. Свинарчук. “Scientific Rationale for Cos Lettuce Growing Technology Lactuca Sativa Var. Longifolia L. In the Forest-Steppe of Ukraine”. Plant Varieties Studying and Protection, no. 2(23), Apr. 2014, pp. 45-50, doi:10.21498/2518-1017.2(23).2014.56156.