TY  - JOUR 
T1  - Cyanobacterial occurrence and detection of microcystin by planar chromatography in surface water of Billings and Guarapiranga Reservoirs, SP, Brazil
JO  - Brazilian Journal of Botany
A1  - Carvalho, Luciana R. de
A1  - Sant'Anna, Célia L.
A1  - Gemelgo, Marcina C.P.
A1  - Azevedo, Maria Teresa de P.
SN  - 0100-8404
UL  - 10.1590/S0100-84042007000100014
VL  - 30 
Y1  - 2007
PB  - Brasil 
ER  -