Maton, Anthea; Jean Hopkins; Charles William McLaughlin; Alexandra Senckowski; Susan Johnson; Maryanna Quon Warner; David LaHart; Jill D. Wright (1993). Human Biology and Health. Englewood Cliffs, New Jersey: Prentice Hall. ISBN978-0-13-981176-0.
Cai Q, Ahmad M (June 2020). "Eustachian valve, interatrial shunt, and paradoxical embolism". Echocardiography. 37 (6): 939–944. doi:10.1111/echo.14682. PMID32426851.
Tousoulis D, Kampoli AM, Tentolouris C, Papageorgiou N, Stefanadis C (January 2012). "The role of nitric oxide on endothelial function". Curr Vasc Pharmacol. 10 (1): 4–18. doi:10.2174/157016112798829760. PMID22112350.
Garcia R, Labropoulos N (April 2018). "Duplex Ultrasound for the Diagnosis of Acute and Chronic Venous Diseases". Surg Clin North Am. 98 (2): 201–218. doi:10.1016/j.suc.2017.11.007. PMID29502767.
Cai Q, Ahmad M (June 2020). "Eustachian valve, interatrial shunt, and paradoxical embolism". Echocardiography. 37 (6): 939–944. doi:10.1111/echo.14682. PMID32426851.
Tousoulis D, Kampoli AM, Tentolouris C, Papageorgiou N, Stefanadis C (January 2012). "The role of nitric oxide on endothelial function". Curr Vasc Pharmacol. 10 (1): 4–18. doi:10.2174/157016112798829760. PMID22112350.
Donovan, Mary F.; Arbor, Tafline C.; Bordoni, Bruno (2023). "Embryology, Yolk Sac". StatPearls. StatPearls Publishing. PMID32310425. Retrieved 22 March 2023.
Garcia R, Labropoulos N (April 2018). "Duplex Ultrasound for the Diagnosis of Acute and Chronic Venous Diseases". Surg Clin North Am. 98 (2): 201–218. doi:10.1016/j.suc.2017.11.007. PMID29502767.