Li, Hongya, Bin Li, and Xuehua Wen. “Clinical Efficacy of Phentolamine in the Treatment of feeding intolerance in Premature Infants With Low Birth Weight”. Pakistan Journal of Medical Sciences 36, no. 7 (October 19, 2020). Accessed May 5, 2024. https://pjms.org.pk/index.php/pjms/article/view/2633.