TY  - JOUR 
T1  - Determination of the estrous cycle phases of rats: some helpful considerations
JO  - Brazilian Journal of Biology
A1  - MARCONDES, F. K.
A1  - BIANCHI, F. J.
A1  - TANNO, A. P.
SN  - 1519-6984
UL  - 10.1590/S1519-69842002000400008
VL  - 62 
Y1  - 2002
PB  - Brasil 
ER  -