Bhattacharyya AK, Gupta AK, Nayar HS. New Low Resistance Respiratory Valve. Def. Sc. J. [Internet]. 2014 Feb. 12 [cited 2025 Jun. 15];32(2):95-8. Available from: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/6199