Hina Hanif Mughal, Saadat Naqvi, Riffat Raja, Hamza Waqar Bhatti, Khansa Gohar, Warda Ali. “Role of Occiput Spinal Angle-A Novel Sonographic Index to Predict the Outcome of Labour”. Journal of Rawalpindi Medical College, vol. 25, no. 3, Sept. 2021, doi:10.37939/jrmc.v25i3.1569.