Ångström–Prescott equation: Physical basis, empirical models and sensitivity analysis - Paulescu, M.; Stefu, N.; Calinoiu, D.; Paulescu, E.; Pop, N.; Boata, R.; Mares, O. (Renewable & sustainable energy reviews, 2016)
Keywords: Clearness index; Relative sunshine; Ångström–Prescott equation; Ångström–Prescott equation; Clearness index; Relative sunshine