KSHIRSAGAR, N., P. A. HAWALE, and A. PATIL. “A RANDOMIZED CONTROLLED TRIAL OF ORAL NIFEDIPINE AND PARAENTRAL ISOXSUPRINE IN ARRESTING PRETERM LABOUR”. UTTAR PRADESH JOURNAL OF ZOOLOGY, vol. 41, no. 19, Nov. 2020, pp. 1-6, https://mbimph.com/index.php/UPJOZ/article/view/1724.