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3 Fu, P., "The solar analyst 1. 0 manual" Helios Environmental Modeling Institute(HEMI) 2000
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5 Paul, W. S. J., "Surface meteorology and solar energy, Release 6.0 (SSE 6.0) methodology"
6 Samanta, S., "Spatial analysis of renewable energy in Papua New Guinea through remote sensing and GIS" 6 : 853-862, 2015
7 Dickinson, W. C., "Solar energy technology handbook" Marcel Dekker 1980
8 Coltelli, M., "SIR-C/X-SAR multifrequency multipass interferometry : A new tool for geological interpretation" 101 : 23127-23148, 1996
9 Louis, E. A., "Relationship between global solar radiation and sunshine duration for Onne, Nigeria" 27 : 161-167, 2003
10 Godfrey Nnaegbo Okonkwo, "Relationship between Global Solar Radiation and Sunshine Hour Duration for Bida in Nigeria" Science Publishing Group 3 (3): 43-, 2014
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