Sarmila Guha Banerjee, et al. “Effect of Position - Trendelenburg and Horizontal on the Height of Sensory Block in Patients Undergoing Lower Abdominal Surgery”. Asian Journal of Medical Sciences, vol. 14, no. 7, July 2023, pp. 52-57, https://nepjol.info./index.php/AJMS/article/view/53294.