CETIN, Aymelek, and Aysel KUKNER. “The Remnants Found in the Umbilical Cord During Fetal Period”. Annals of Medical Research 6, no. 4 (May 25, 2021): 0293–0296. Accessed May 16, 2024. http://www.annalsmedres.org/index.php/aomr/article/view/3018.