Sasikumar, Navaneetha, Indra Kuladhipati, Sowmya Ramanan, Premsekar Rajasekaran, Raghavan Suramanyan, and Krishna Manohar Soman Rema. 2013. “Congenital Pulmonary Vein Stenosis - Diagnosis and Treatment”. International Journal of Medical Research and Review 1 (1), 20- 26. https://doi.org/10.17511/ijmrr.2013.i01.04.