Cilliers, L., and F. Retief. “The Cardiovascular System, As Understood in Antiquity”. Suid-Afrikaans Tydskrif Vir Natuurwetenskap En Tegnologie / <i>South African Journal of Science and Technology</I&gt;, Vol. 26, no. 3, Sept. 2007, pp. 205-1, doi:10.4102/satnt.v26i3.134.