1. The interrelationship and characteristic distribution of direct, diffuse and total solar radiation;Liu;Solar Energy,1960
2. The average distribution of solar radiation—correlation between diffuse and hemispherical and between daily and hourly insolation values;Collares-Pereira;Solar Energy,1979
3. The estimation of monthly mean values of daily total short-wave radiation on vertical and inclined surfaces from sunshine records for latitudes 40°N–40°S;Page,1961
4. Calculation of monthly average insolation on tilted surfaces;Klein;Solar Energy,1966
5. The relationship of diffuse to total radiation in Canada;Ruth;Solar Energy,1976