1. A study of atmospheric turbidity in Athens by means of the general turbidity factor;Karalis,1973
2. Atmospheric turbidity at Athens Observatory;Katsoulis,1976
3. Turbidity of Greek sky;Katsoulis;Arch. Met. Geoph. Biokl. Ser. B,1979
4. Cleansing of the atmosphere in the Athens area by means of rainfall and wind;Sahsamanoglou,1980
5. The attenuation of solar radiation in the city of Thessaloniki as a result of atmospheric pollution;Sahsamanoglou,1985