Dwimartutie, Noto, Siti Setiati, Tirza Z Tamin, Ani Retno Prijanti, Alida R Harahap, Dyah Purnamasari, Kuntjoro Harimurti, and I Dewa Putu Pramantara. “Vitamin D Levels in Pre-Frail Older Adults and Its Correlation With Hand Grip Strength”. Acta Medica Indonesiana 55, no. 2 (July 28, 2023): 172. Accessed December 22, 2025. http://actamedindones.org/index.php/ijim/article/view/2309.