Lisnyak, A., and S. Torma. “Agroecological Research of PH Value in Acidic Soils at Liming Absence”. Visnyk of V. N. Karazin Kharkiv National University Series «Еcоlogy», no. 15, Jan. 2017, pp. 51-57, doi:10.26565/1992-4259-2016-15-07.