JANÍK, Rastislav et al. Sulphate contamination, pH and conductivity of forest soils in two neighbouring mountains with different pollution in Slovakia from 1989 to 2013. In Soil and water research. ISSN 1801-5395, 2018, vol. 13, no. 3, p. 129-139. VEGA 2/0087/14 ; VEGA 2/0120/17 ; VEGA 2/0136/16. CCC, WOS, SCOPUS. Dostupné na internete: <https://www.agriculturejournals.cz/publicFiles/218_2015-SWR.pdf>