Khalid, A., A. Khan, A. Anwar, M. Yousaf, O. Anwar, and A. Parveen. “Comparison Between Glyceryl Trinitrate and Ritodrine As a Tocolytic Agent in Pre-Term Labour”. Annals of Punjab Medical College (APMC), Vol. 13, no. 1, Mar. 2019, pp. 1-3, doi:10.29054/apmc/2019.24.