du Plessis, J., Henning, L. and Berner, J. (2013) “Decline in the photosynthetic capability of wheat plants after fumigation with SO<sub>2</sub> in open-top chambers”, 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.v32i1.836.