TY  - JOUR 
T1  - Low pH and calcium effects on net Na+ and K+ fluxes in two catfish species from the Amazon River (Corydoras: Callichthyidae)
JO  - Brazilian Journal of Medical and Biological Research
A1  - Matsuo, A.Y.
A1  - Val, A.L.
SN  - 0100-879X
UL  - 10.1590/S0100-879X2002000300012
VL  - 35 
Y1  - 2002
PB  - Brasil 
ER  -