1. Archibald, C. G. M., 1966. Some new and interesting cyanophytes from the Kowie river system in the eastern Cape Province (South Africa). Nova Hedwigia 12: 429–538.
2. Archibald, C. G. M., 1967. New and interesting cyanophytes from the Kowie river system in the eastern Cape Province (South Africa). II. Nova Hedwigia 13: 389–395.
3. Biggs, B. J. F. & G. M. Price, 1987. A survey of filamentous algal proliferations in New Zealand rivers. N.Z. J. Mar. & Freshwat. Res. 21: 175–191
4. Braun, A., 1868. Die Characeen Africas. Monatsb. d. Königl. Akad. Berlin: 782–872.
5. Bruwer, C. A., 1980. Aksieplan vir die ontwerp Van ‘n beheerstrategie teen die oormatige groei Van Cladophora in besproeiingskanale. Report BC:001 for the Department of Water Affairs, Forestry and Environment, Pretoria, 7 pp.