Lagoo, J. Y., D’Souza, M. C. and Appanervanda, K. M. (2017) “Percutaneous tracheostomy by Griggs technique: a retrospective analysis”, International Journal of Research in Medical Sciences, 3(3), pp. 738–742. Available at: https://www.msjonline.org/index.php/ijrms/article/view/1367 (Accessed: 26 September 2025).