Atiku, Mamuda, et al. “Graded Epidural Anaesthesia for Abdominal Hysterectomy in an Adult With Congenital Heart Disease: A Case Report”. Nigerian Journal of Anaesthesia, vol. 2, no. 2, Nov. 2025, pp. 114-6, https://doi.org/10.82223/nja.vol2no2.49.