Malcheva, B., P. Naskova, and D. Dimitrov. “DYNAMICS OF THE MICROBIOLOGICAL INDEXES AT LIME TREATMENT OF SLUDGES FROM A PURIFICATION PLANT”. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, Vol. 5, no. 2, Dec. 2021, pp. 146-55, doi:10.29114/ajtuv.vol5.iss2.256. Accessed 20 Aug. 2025.