Makungo, T. and van Ree, T. (2014) “6,7-Dimethoxycoumarin, the active substance of the parsley tree, <i>Heteromorpha arborescens</i>”, Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt;, 33(1), p. 3 bladsye. doi: 10.4102/satnt.v33i1.762.