1. Evaluation of selected models for estimating solar radiation on horizontal surfaces;Davies;Solar Energy,1989
2. Estimating solar irradiance and components;Davies;Solar Energy,1982
3. Parametrisierung der globalstrahlung durch bedeckungsgrad und trubungsfaktor;Kasten;Ann Met.,1983
4. Average insolation in Canada during cloudless days;Mateer;Can. J. Technol.,1955
5. Calculation of the solar radiation incident on a horizontal surface;Davies,1980