Poudyal, K. N., P. Daponte, S. Rapone, B. Bhattari, B. Sapkota, and B. Kjeldstad. “Study of Global Solar Radiation Potential and Ground Level Albedo at Benevento Italy”. Journal of the Institute of Engineering, vol. 8, no. 1-2, July 2011, pp. 284-90, doi:10.3126/jie.v8i1-2.5124.