https://scholar.google.com/scholar_lookup?title=Saliva+and+Dental+Erosion&author=Buzalaf,+M.A.R.&author=Hannas,+A.R.&author=Kato,+M.T.&publication_year=2012&journal=J.+Appl.+Oral+Sci.&volume=20&pages=493–502&doi=10.1590/S1678-77572012000500001