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Reis, A. C. de S.; Coêlho, T. de J. F.; Alves, N. L. de L. Estimation of Solar Energy, in Recife Area, Based on Bright Sunshine Registration. PAB 2014, 8 (7), 177-179. https://doi.org/10.1590/S1678-3921.pab1973.v8.17509.