https://scholar.google.com/scholar_lookup?title=Concentration+of+Calcium,+Phosphate+and+Fluoride+Ions+in+Microbial+Plaque+and+Saliva+after+Using+CPP-ACP+Paste+in+6–9+Year-Old+Children&author=Poureslami,+H.R.&author=Hoseinifar,+R.&author=Hoseinifar,+R.&author=Sharifi,+H.&author=Poureslami,+P.&publication_year=2016&journal=J.+Dent.+Biomater.&volume=3&pages=214–219