Shalim, C. P., A. Yoewono, Y. Utomo, and R. T. Kuswardhani. “THE ROLE OF PROBIOTIC SUPPLEMENTATION ON THE IMMUNE SYSTEM IN ELDERLY”. International Journal of Medical and Biomedical Studies, vol. 3, no. 8, Sept. 2019, pp. 250-5, doi:10.32553/ijmbs.v3i8.492.