Podgaiskytė, Viktorija, and Petras Vaitiekūnas. 2009. “Determination of Cadmium in a Municipal Sewage Sludge Based Compost by Spectrophotometric Method”. Journal of Environmental Engineering and Landscape Management 17 (4):219-25. https://doi.org/10.3846/1648-6897.2009.17.219-225.