Low-fluoride dentifrices with reduced pH: fluoride concentration in whole saliva and bioavailability - Olympio, Kelly Polido Kaneshiro; Bardal, Priscila Ariede Petinuci; Cardoso, V. E. da S.; Oliveira, R. C.; Bastos, José Roberto de Magalhães; Buzalaf, Marília Afonso Rabelo (Caries Research, 2007)