Oscar Gutiérrez-Rodríguez. “Twenty Years Later: Thalidomide, a New Antirheumatic Agent. Preliminary Communication”. Colombia Medica 12, no. 4 (December 31, 1981): 176–179. Accessed August 25, 2024. https://colombiamedica.univalle.edu.co/index.php/comedica/article/view/6037.