1. The estimation of monthly mean values of daily short wave radiation;Page,1961
2. The dependence on cloudiness and turbidity of the monthly average daily diffuse-global correlations;Soler;Solar and Wind Technology,1987
3. Modelling slope irradiance at high latitudes;Skartveit;Solar Energy,1986
4. Correlations entre les expositions energetiques du rayonment solaire et l'ensoillement a Uccle;Dogniaux,1977
5. Techniques modernes de measure de l'eclairement énergetique solaire;Dogniaux,1955