Kumar P, Govil D, Patel SJ, Jagadeesh KN, Gupta S, Srinivasan S, et al. Percutaneous tracheostomy under real-time ultrasound guidance in coagulopathic patients: a single-center experience. Indian J Crit Care Med 2020;24(2):122–127. DOI: 10.5005/jp-journals-10071- 23344.
Pattnaik SK, Ray B, Sinha S. Griggs percutaneous tracheostomy without bronchoscopic guidance is a safe method: a case series of 300 patients in a tertiary care intensive care unit. Indian J Crit Care Med 2014;18(12):778–782. DOI: 10.4103/0972-5229.146303.