Tabassum, A., W. Qadir, S. Shahzad, A. Rafique, and A. Sohail. “Comparison of Efficacy and Safety of Caffeine and Aminophylline in Apnea of Prematurity”. Annals of Punjab Medical College, Vol. 17, no. 4, Dec. 2023, pp. 446-50, doi:10.29054/apmc/2023.1202.