Krishnappa, Manjunath Hunasenahalli, Prasanna Kumar Thimmarayappa, Vivek Nangia, and Rajat Chatterji. 2021. “Outcome of Ventilation in Patients With Hypercapnic Respiratory Failure in IPF Patients: A Prospective Study”. Asian Journal of Medical Sciences 12 (9):111-15. https://www.nepjol.info/index.php/AJMS/article/view/37155.