Grygoryuk, I., and I. Feketa. “Edaphic Growth Conditions Centaurium Erythraea Rafh. In Conditions of Transcarpathia”. Agrobiodiversity for Improving Nutrition, Health and Life Quality, no. 1, Nov. 2017, http://sandbox.agrobiodiversity.uniag.sk/scientificpapers/article/view/48.