TY  - JOUR 
T1  - Ecological correlates of polyphenism and gregarious roosting in the grass yellow butterfly Eurema elathea (Pieridae)
JO  - Brazilian Journal of Biology
A1  - Ruszczyk, A.
A1  - Motta, P. C.
A1  - Barros, R. L.
A1  - Araújo, A. M.
SN  - 1519-6984
UL  - 10.1590/S1519-69842004000100017
VL  - 64 
Y1  - 2004
PB  - Brasil 
ER  -