1. Distribution of direct and total solar radiation availabilities for the U.S.A.;Boes;Sandia Report SAND76-0411,1976
2. The frequency distribution of daily insolation values;Bendt;Solar Energy,1981
3. Estimation of the diffuse radiation fraction for hourly, daily, and monthly-average global radiation;Erbs;Solar Energy,1982
4. Models and application for water statistics related to building heating and cooling loads;Erbs,1984
5. Solar engineering of thermal processes;Duffie,1991