Economical Estimation of the Losses of Crops Due to High Ozone Levels. - Ivan Dimov 001; Tzvetan Ostromsky; Ilia Tzvetanov; Zahari Zlatev (LSSC, 1999)

Estimation of the Wheat Losses Caused by the Tropospheric Ozone in Bulgaria and Denmark. - Tzvetan Ostromsky; Ivan Dimov 001; Ilia Tzvetanov; Zahari Zlatev (NAA, 2000)