Bachry, N. C., Nur Riviati, Yulianto kusnadi, and Erial Bahar. “Correlation of Vitamin D Serum Levels With Muscle Mass, Muscle Strength, and Physical Performance in the Elderly Community in Mohammad Hoesin General Hospital Palembang”. Bioscientia Medicina : Journal of Biomedicine and Translational Research, Vol. 5, no. 3, Jan. 2021, pp. 307-19, doi:10.32539/bsm.v5i3.225.