VYAS, S.; VYAS, K. S. A systemic review of clinical trials of COVID-19, registered in WHO-ICTRP. International Journal of Clinical Trials, [S. l.], v. 7, n. 3, p. 212–220, 2020. DOI: 10.18203/2349-3259.ijct20203108. Disponível em: https://www.ijclinicaltrials.com/index.php/ijct/article/view/423. Acesso em: 13 may. 2025.