^Kalibbala, H. M.; Wahlberg, O.; Hawumba, T. J. (1 December 2009). "The impact of Moringa oleifera as a coagulant aid on the removal of trihalomethane (THM) precursors and iron from drinking water". Water Science and Technology: Water Supply. 9 (6): 707–714. doi:10.2166/ws.2009.671. ISSN 1606-9749
^Mpagi., Kalibbala, Herbert (2012). Removal of natural organic matter and control of trihalomethanes formation in water treatment. Stockholm: Architecture and the Built Environment, KTH Royal Institute of Technology. ISBN 9789175013237. OCLC 939795543