1. "Fetal Circulation" от American Heart Association: https://www.heart.org/en/health-topics/congenital-heart-defects/about-congenital-heart-defects/fetal-circulation
2. "Transition from Fetal to Neonatal Circulation" от Medscape: https://emedicine.medscape.com/article/182753-overview
3. "Fetal and Neonatal Physiology" от Richard A. Polin and Steven H. Abman
4. "The Physiology of the Fetal and Neonatal Circulation" от John M. Lorenz and Steven M. Donn.