Anayat Ullah Safi, Khawar Iqbal, Mohammad Shoaib Khan, Farah Saleem, Umair Tahir Chaudary, Muhammad Attique Sadiq, “Sigmoid Volvulus; Frequency of Postoperative Complications of Primary Repair”, Pakistan Journal of Medical & Health Sciences, vol. 16, no. 02, p. 1168, Apr. 2022.