Published Tropospheric ozone in the Czech Republic, 1994-2000 by Tshiamala Mbuyi M.-H. tshiamala_mbuyi_163-170.pdf
Published Analysis of the 11-year Record (1987-1997) of Air Pollution measurements in Athens, Greece. Part II: Photochemical air pollutants by Kalabokas P.D., Viras L.G., Repapis C.C. kalabokas_partII.pdf