Gupta, Anuradha, and Neelam Bansal. “Microanatomical Studies on Ductus Arteriosus With Relation to Foetal Age”. Indian Journal of Veterinary Anatomy 24, no. 1 (October 30, 2012). Accessed June 1, 2026. https://epubs.icar.org.in/index.php/IJVA/article/view/24870.