`Yousaf, K. R.; Saeed, S.; Chaudhry, S.; Bashrat, R.; Khalid, A.; Baig, U.; Haq, M.; Azhar, T.; Zafar, M. Usefulness of Grey Scale and Doppler Transvaginal Sonography in Diagnosis of Ovarian Torsion. J Fatima Jinnah Med Univ 2020, 14, 97-102.