TY  - JOUR 
T1  - Monthly values of the standardized precipitation index in the State of São Paulo, Brazil: trends and spectral features under the normality assumption
JO  - Bragantia
A1  - Blain, Gabriel Constantino
SN  - 0006-8705
UL  - 10.1590/S0006-87052012005000004
VL  - 71 
Y1  - 2012
PB  - Brasil 
ER  -