Minnaar, M., Strasser, R. and Kruger, G. (2013) “Sulphur dioxide contamination and drought lead to reduced PSII-activity and CO<sub>2</sub> assimilation in maize plants (<i>Zea mays</i>)”, Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt;, 32(1), p. 1 page. doi: 10.4102/satnt.v32i1.811.