Farah Naz Memon, Sasui Memon, Fazal Hussain, Zia Ul Islam, Abdul Rehman, Atqa Firdous, “Comparative Study of Ultrasound-Guided vs Landmark-Based Pudendal Nerve Block for Labour Analgesia”, Pakistan Journal of Medical & Health Sciences, vol. 17, no. 11, p. 478, Nov. 2023.