Shakya, S., et al. “Ultrasonographic Evaluation of Inferior Vena Cava: Aorta Index With a Cut-off Value of 1.0 As a Predictor for Hypotension After Induction of General Anesthesia; An Observational Study”. Kathmandu University Medical Journal, vol. 20, no. 2, June 2022, pp. 171-7, doi:10.3126/kumj.v20i2.51174.