Rui, Ke, Wang Hongxing, Tan Yunzhi, and Wang Lehua. 2019. ‚ÄúSolidification of High Organic Matter Content Sludge by Cement, Lime and Metakaolin‚ÄĚ. Periodica Polytechnica Civil Engineering 63 (1), 53-62. https://doi.org/10.3311/PPci.12293.