1. Beukes N. J. (1983) in Ironformations: Facts and Problems, Paleoenvironmental setting of iron-formations in the depositional basin of the Transvaal Supergroup, South Africa, eds Trendall A. F. Morris R. C. (Elsevier, Amsterdam), pp 139–209.
2. Beukes N. J. (1989) Sedimentological and geochemical relationships between carbonate, iron-formation and manganese deposits in the Early Proterozoic Transvaal Supergroup, Griqualand West, South Africa. Abstract volume, 28th International Geological Congress, Washington, DC, USA, 143.
3. Geology and genesis of manganese oolite, Chiatura, Georgia, U.S.S.R.
4. Late Proterozoic outer shelf manganese and iron deposits at Otjosondu (Namibia) related to the Damaran oceanic opening
5. Presevation of sedimentary features in Late Proterozoic manganese and iron-formations (Namibia) through upper amphibolite facies metamorphism: protoliths, paleoenvironment and ore genesis;Bühn;Resource Geology, Special Issue,1993