@article{article16402f21,
title   = {Diurnal evolution od solar radiation at the surface in the city of São Paulo: seasonal variation and modeling},
author = {Oliveira, Amauri Pereira de and Machado, A. J. and Escobedo, J. F. and Soares, Jacyra Ramos},
year = {2002},
doi = {10.1007/s007040200007},
journal   = {Theoretical and Applied Climatology}
}