@article{article2b3cd1dc,
title   = {Modeling hourly and daily fractions of UV, PAR and NIR to global solar radiation under various sky conditions at Botucatu, Brazil},
author = {Escobedo, João F and Oliveira, Amauri Pereira de and Gomes, Eduardo N. and Soares, Jacira Ramos},
year = {2009},
doi = {10.1016/j.apenergy.2008.04.013},
journal   = {Applied Energy}
}