Comparison of frequency of tachycardia of Caffeine versus Aminophylline for Apnea of Prematurity. Pakistan Journal of Medical & Cardiological Review, [S. l.], v. 4, n. 4, p. 1266–1274, 2025. DOI: 10.64105/gg5yq771. Disponível em: https://pakjmcr.com/index.php/1/article/view/307. Acesso em: 24 jun. 2026.