[1] Thalfeldt, M., Pikas, H., Kurnitski, J. and Voll, H. (2013) Façade Design Principles for Nearly Zero Energy Buildings in a Cold Climate. Energy and Buildings, 67, 309-321.
http://dx.doi.org/10.1016/j.enbuild.2013.08.027
[2] Voll, H. and Koiv, T.-A. (2009) Daylight Availability and Cooling in Commercial Buildings—The Influence of Façade Design. WEAS Transactions on Advances in Engineering Education, 6, 316-326.
[3] Ineichen, P., Guisan, O. and Perez, R. (1990) Ground-Reflected Radiation and Albedo. Solar Energy, 44, 207-214.
[4] Skartveit, A., Olseth, J.A. and Tuft, M.A. (1998) An Hourly Diffuse Fraction Model with Correction for Variability and Surface Albedo. Solar Energy, 63, 173-183.
[5] Muneer, T. (2004) Solar Radiaton and Daylight Models. Elsevier Butterworth-Heinemann, Burlington.
[6] Tomson, T. (2013) Diffuse Solar Radiation in Estonia. Investigation and Usage of Renewable Energy Sources. XV Conference Proceedings, Estonian University of Life Sciences, Tartu, 86-95.
[7] Liu, B.Y.H. and Jordan, C. (1963) The Long-Term Average Performance of Flat-Plate Solar Energy Collectors: With Design Data for the U.S., Its Outlying Possessions and Canada. Solar Energy, 7, 53-74.
http://dx.doi.org/10.1016/0038-092X(63)90006-9
[8] Quashning, V. and Hanitch, R. (1998) Irradiance Calculations on Shaded Surfaces. Solar Energy, 62, 369-375.
[9] (2014) Soldata Instruments. www.soldata.dk
[10] Tooming, H. (2003) Handbook of Estonian Solar Radiation Climate. EMHI, Tallinn.
[11] Ohmura, A., Gilgen, H., Hegner, H., Müller, G. and Wild, M. (1998) Baseline Surface Radiation Network (BSRN/WCRP): New Precision Radiometry for Climate Research. Bulletin of the American Meteo-rological Society, 79, 2115-2136.
http://dx.doi.org/10.1175/1520-0477(1998)079<2115:BSRNBW>2.0.CO;2