Pienaar, Wessel. “Economic Aspects of Pipeline Transport: A South African Perspective”. Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt; 28, no. 2 (September 6, 2009): 119-140. Accessed April 28, 2024. http://www.satnt.ac.za/index.php/satnt/article/view/185.