Kusumaratna, Rina K., Oktavianus Ch. Salim, and Novia I Sudharma. 2007. “Dietary Zinc Intake and Zinc Status Differences Between Male and Female Elderls of South Jakarta Community”. Universa Medicina 26 (4):179-85. https://doi.org/10.18051/UnivMed.2007.v26.179-185.