TY  - JOUR 
T1  - Crown-down preflaring in the determination of the first apical file
JO  - Brazilian Oral Research
A1  - Silveira, Luiz Fernando Machado
A1  - Silveira, Carina Folgearini
A1  - Castro, Luis Antônio Suita de
A1  - César Neto, João Batista
A1  - Martos, Josué
SN  - 1806-8324
UL  - 10.1590/S1806-83242010000200005
VL  - 24 
Y1  - 2010
PB  - Brasil 
ER  -