1. Cucumo M, Kaliakatsos D, Marinelli V. Stazione di Prova ad orientamento variabile. Condizionamento dell'aria, Riscaldamento, Refrigerazione, January 1998. p. 38–41.
2. Longwave sky radiation parametrizations;Aubinet;Solar Energy,1994
3. ISO 6946. Building components and building elements—Thermal resistance and thermal transmittance—calculation method 1996.
4. Long-wave radiation from clear skies;Swinbank;Quarterly Journal of the Royal Meteorological Society,1963
5. Thermal radiation from the atmosphere;Idso;Journal of Geophysical Research,1969