Soekanto, S. A., G. C. G. . DUHITA, E. W. Bachtiar, and M. Sahlan. “THE EFFECT OF CASEIN PHOSPHOPEPTIDE-AMORPHOUS CALCIUM PHOSPHATE-PROPOLIS CHEWING GUM ON CALCIUM AND PHOSPHATE ION LEVELS IN CARIES-FREE SUBJECT’S SALIVA AND STREPTOCOCCUS MUTANS BIOFILM FORMATION”. Asian Journal of Pharmaceutical and Clinical Research, vol. 10, no. 17, Oct. 2017, pp. 174-6, doi:10.22159/ajpcr.2017.v10s5.23125.