Authors: Sym, SD Pienaar, RN

Citation: Sd. Sym et Rn. Pienaar, Additional punctate species of Pyramimonas, P-formosa, sp nov., and its impact on the subgenera Punctatae and Pyramimonas (Prasinophyceae, Chlorophyta), J PHYCOLOGY, 35(6), 1999, pp. 1313-1321

Authors: Gillespie, RD Sym, SD Rogers, KH

Citation: Rd. Gillespie et al., A preliminary investigation of the potential to determine the age of individual trees of Breonadia salicina (Rubiaceae) by relating xylem vessel diameter and area to rainfall and temperature data, S AFR J BOT, 64(6), 1998, pp. 316-321