Karim, H., and P. Nayak. “Requirement and Response Pattern for Sedatives in COVID-19 Patients Requiring Non-Invasive Ventilation: A Pilot Observation”. Anaesthesia, Pain & Intensive Care, Vol. 26, no. 2, Sept. 2022, pp. 260-2, doi:10.35975/apic.v26i2.1809.