Kusumawati, I., B. Murti, and E. P. Pamungkasari. “Meta-Analysis of Associations Between Maternal Age, Low Hemoglobin Level During Pregnancy, Low Birth Weight, and Preterm Birth”. Journal of Maternal and Child Health, vol. 8, no. 6, Jan. 2024, pp. 762-75, doi:10.26911/thejmch.2023.08.06.10.