Neliwa, G.& Kalumbu, G. Investigation of productivity and efficiency of a passive solar desalination technology for brackish water in Northern- Central Namibia. International Journal on Hydropower and dams,April 2019.
Kalumbu,G., Kgabi,N.,Rynders,C. The Impact of Industrial Effluent on River Quality: A case of Klein Windhoek River, Lambert Academic Publishing, 109 Pages, January 2017, ISBN:978-3-330-03501-0
Kgabi, N., Uugwanga, M.,Iithindi., Knoeller, K., Atekwana, E., Wanke, H., Mathuthu, M., Kalumbu, G., Amwele, H., Uusizi. Isotopic composition and elemental concentration of water bodies in the Kuiseb and Cuvelai-Etosha basin, Namibia. January 2017
Njinga, R., Amwele, H., Kalumbu, G., Tshivhase, V., Motsei, L., & Kgabi N., Ingestion dose exposure to metal contaminants in Cow-Livers around Mafikeng metropolis in South Africa, Journal of Toxicology and Environmental Health, March 2017
Amwele H., Motsei L., Kalumbu G.,Kgabi N., Njingan R.,Tshivave V. Investigation of possible human exposure to metal concentration in vegetables. Journal of Toxicology & Environmental Health Science, Vol 9(7),pp66-76, July 2017
Amwele H.,Iithindi J., Kalumbu G.,Kgabi N.,Mathuthu M.,Motsei L.,Tshivave V. Assessment of toxic metals in borehole water; A case of the Kuiseb basin, Namibia,. European Journal of Scientific Research, Vol141(2), pp108-115, August 2016.