E. Vermaak

The seasonal and spatial distribution of cyanobacteria in South African surface waters

C. van Ginkel, M. Silberbauer, E. Vermaak, 2000 .

A Ceratium hirundinella (O.F. Müller) bloom in Hartbeespoort Dam, South Africa

C. V. Ginkel, E. Vermaak, B. Hohls, 2004 .

IDENTIFICATION OF AREAS WITH FAECALLY POLLUTED SURFACE WATER SOURCES IN SOUTH AFRICA

C. V. Ginkel, E. Vermaak, A. Kühn, 2000 .