Vityala Yethindra, Tugolbai Tagaev, Melis Sholpanbai Uulu, and Yogesh Parihar, “Efficacy of umifenovir in the treatment of mild and moderate COVID-19 patients”, Int. J. Res. Pharm. Sci., vol. 11, no. (SPL 1), pp. 506–509, Aug. 2020.