TY  - JOUR 
T1  - Reproductive aspects of piranhas Serrasalmus spilopleura and Serrasalmus marginatus into the Upper Paraná River, Brazil
JO  - Brazilian Journal of Biology
A1  - Agostinho, C. S.
SN  - 1519-6984
UL  - 10.1590/S1519-69842003000100002
VL  - 63 
Y1  - 2003
PB  - Brasil 
ER  -