Ram, K. K. ., A. . Kumar, and R. . Singh. “Morphological Analysis of Sacral Hiatus Variations and Their Relevance in Caudal Epidural Anesthesia”. Indian Journal of Pharmaceutical and Biological Research, vol. 14, no. 04, Sept. 2026, pp. 95-104, doi:10.30750/ijpbr.14.4.14.