Güvenir, M., Özel Yürüker, O. Yetkin, K. Süer, and B. Otlu. “Comparative Humoral Response of MRNA and Inactivated Vaccines Against COVID-19 in Healthy Adults Aged 60 Years and Older”. The Journal of Infection in Developing Countries, vol. 17, no. 02, Feb. 2023, pp. 178-81, doi:10.3855/jidc.16842.