Hunyadi, G., T. Bíró, J. Tamás, and M. Piskolczi. “Product Orientated Sewage Sludge Composting Technologies in the Practice of AKSD Ltd.”. Acta Agraria Debreceniensis, no. 30, Oct. 2008, pp. 33-36, doi:10.34101/actaagrar/30/2988.