Tirtha Ratan Ghosh (2023) “Validation of two preoxygenation techniques, 3 min tidal volume breath and eight vital capacity breath techniques in tribal and non-tribal population of Eastern India”, Asian Journal of Medical Sciences, 14(5), pp. 29–34. Available at: https://nepjol.info/index.php/AJMS/article/view/50930 (Accessed: 5 December 2025).