TY  - JOUR 
T1  - Difficult male urethral catheterization: a review of different approaches
JO  - International braz j urol
A1  - Villanueva, Carlos
A1  - Hemstreet III, George P.
SN  - 1677-5538
UL  - 10.1590/S1677-55382008000400002
VL  - 34 
Y1  - 2008
PB  - Brasil 
ER  -