TY  - JOUR 
T1  - Preface: over-the-counter preventive and therapeutic oral products
JO  - Brazilian Oral Research
A1  - Maltz, Marisa
SN  - 1806-8324
UL  - 10.1590/S1806-83242009000500002
VL  - 23 
Y1  - 2009
PB  - Brasil 
ER  -