1. Daily insolation on surfaces tilted towards the equator;Liu,1962
2. Study of shortwave radiation on non-horizontal surfaces;Hay;Canadian Climate Centre, Report No. 79-12,1979
3. Evaluation of models to predict insolation on tilted surfaces;Klucher;Solar Energy,1979
4. The computation of solar energy intensities, Pt. 2, Solar radiation on inclined surfaces;Heywwod,1965
5. Solar radiation on inclined surfaces;Norris;Solar Energy,1981