ELTIGANI, K. .; S WANASI, E. .; AHMED, A. S.; ELKHAWAD, A. O. . Difficulties Faced By Pharmaceutical Industries Associated With COVID-19 Pandemic in Obtaining Raw Materials for Production of Certain Drugs in Sudan in 2021 . International Journal of Pharmaceutical and Bio Medical Science, [S. l.], v. 3, n. 06, p. 281–283, 2023. DOI: 10.47191/ijpbms/v3-i6-05. Disponível em: https://ijhmr.ijhmr.ijhmr.com/index.php/ijpbms/article/view/298. Acesso em: 6 jul. 2024.