Swanepoel, J. J., A. C. De La Harpe, and C. J. Orffer. “A Comparative Anatomical Study of the Grapevine, Shoot and Cane: II: Periderm and Secondary Phloem”. South African Journal of Enology and Viticulture 5, no. 2 (May 10, 2017): 59–63. Accessed February 28, 2026. https://www.journals.ac.za/sajev/article/view/2360.