Groenewald, E., and A. van der Westhuizen. “A Few Aspects of the Physiology of Flowering in Photoperiodic Sensitive Plants”. Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt; 22, no. 1 (September 26, 2003): 6-13. Accessed May 2, 2024. http://satnt.ac.za/index.php/satnt/article/view/111.