1. Allanson, B.R., 1979. The physico-chemical limnology of Lake Sibaya. In: B.R. Allanson (ed.) Lake Sibaya. Monographiae Biologicae 36, Dr W. Junk, The Hague: 42–74.
2. Andrews, F. W.,1956. The flowering plants of the Sudan I-III. Sudan Government Publication.
3. Arber, A., 1920. Water Plants. University Press Cambridge. Beadle, L. C., 1981 (2nd. Edition). The inland waters of tropical Africa. Longman, London.
4. Beadle, L.C.,1981 (2nd Edition). The inland waters of tropical Africa. Longman, London.
5. Begg, G.W., 1978. The estuaries of Natal. Natal Town and Regional Planning Commission, Pietermaritzburg, Report No. 41: 1–657.