1. Performance assessment of the point source version of the simplified Perez Luminance model for vertical surfaces at Madrid, Spain: dependence of model coefficients on surface orientation;Robledo;The International Journal of Lighting Research and Technology,1996
2. A comparison of sky luminance models with measured data from Garston, U.K.;Littlefair;Solar Energy,1994
3. Scartezzini, J. L., Michel, L., Roecker, C. and Rhyner, R., Laboratoire de lumiere naturelle. Centre universitaire d'etude des problemes d l'energie, Geneve, and Laboratoire d'energie solaire et de physique du bátiment EPFL, CH-1015, Lausanne, 1994 [in French].
4. Soler, A. and Oteiza, R. Métodos experimentales, utilidades informiticas y dispositivos para la