1. Comparison between winter and summer sky-luminance distribution in Central Europe and in the Eastern Mediterranean;Bartzokas;J. Atmos. Solar Terrestr. Phys.,2005
2. CIE (108-1994). Comission Internationale de l' Eclairege: Guide to recommended practice of daylight measurement. Publ. CIE Central Bureau, Vienna, 1994a.
3. Darula, S., 2011. Parameterisation of daylight exterior conditions. In: Proceedings of the 19th International Conference Light – Světlo. Prague: Česká společnost pro osvětlování, September 21–23, pp. 136–139.
4. Sunshine duration and daily courses of illuminance in Bratislava;Darula;Int. J. Climatol.,2004
5. Darula, S., Kittler, R., Kambezidis, H.D., Bartzokas, A., 2004. Frequency of probabilities of daylight illuminance courses due to sunshine duration. In: Proceedings of the 1st International Symposium of the Hellenic Illumination Committee. National Research Foundation: Athens, 26–27 February 2004, pp. 26–29.