Besheir Abdallah Hassan. “Persistent Pulmonary Hypertension of the Newborn: Epidemiology, Pathophysiology and Diagnosis”. The International Journal of Multiphysics, vol. 18, no. 3, Sept. 2024, pp. 2374 -86, https://www.themultiphysicsjournal.com/index.php/ijm/article/view/1750.