Kvasauskas, Mindaugas, and Pranas Baltrėnas. “Research on Anaerobically Treated Organic Waste Suitability for Soil Fertilisation”. Journal of Environmental Engineering and Landscape Management, vol. 17, no. 4, Dec. 2009, pp. 205-11, https://doi.org/10.3846/1648-6897.2009.17.205-211.