Saimin, Juminten, et al. “Overview of S-RBD Antibody Levels After Covid-19 Vaccination in Premenopausal and Menopausal Women”. Indonesian Journal of Obstetrics and Gynecology, vol. 11, no. 1, Feb. 2023, pp. 7-8, doi:10.32771/inajog.v11i1.1666.