Šindelá, O. et al. 2020. Phytotoxicity of sewage sludge from selected wastewater treatment plants – new opportunities in sewage sludge treatment. International Journal of Recycling of Organic Waste in Agriculture. 9, 1 (Mar. 2020). DOI:https://doi.org/10.30486/ijrowa.2020.1885285.1002.