World Wildlife Fund (2014). Understanding the food energy water nexus:the agricultural sector as a biofuels producer in South Africa
Energy from wastewater : a feasibility study : essence report : report to the Water Research Commission / Gezina, Pretoria : Water Research Commission, 2009. CD-ROM contains: Guide for technology developers and researchers, industry and wastewater generators, policy makers. G 68 JWRC TT 399/09 & GZCD 68 JWRC TT 400/09
Energy from wastewater - a feasibility study : technical report : report to the Water Research Commission / Gezina, South Africa : Water Research Commission, 2009.
Scoping study on water use of crops/trees for biofuels in South Africa : report to the Water Research Commission / Gezina, South Africa : Water Research Commission, 2009. G 68 JWRC 1772/1/09