Pato, U., Yusuf, Y., Rossi, E., Yunaira, R . and Githasari, T. 2017. Quality of probiotik fermented milk using Lactobacillus casei subsp. casei R-68 as a starter with the variation of skim milk and sucrose. International Journal of Agricultural Technology. 13, 1 (Jan. 2017), 37–46.