1. New approach to estimate Ångstrom coefficients;Abdel Wahab;Sol. Energy,1993
2. Solar and terrestrial radiation;Ångstrom;Q. J. R. Meteorol. Soc.,1924
3. A new kind of cloudy sky model to compute instantaneous values of diffuse and global solar irradiance;Badescu;Theor. Appl. Climatol.,2002
4. Solar radiative transfer through clouds possessing isotropic variable extinction coefficient;Barker;Q. J. R. Meteorol. Soc.,1992
5. Survey and comments on various methods to compute the components of solar irradiance on horizontal and inclined surfaces;Bener,1984