Published Tropospheric ozone in the Czech Republic, 1994-2000 by Tshiamala Mbuyi M.-H. tshiamala_mbuyi_163-170.pdf
Published Malaria situation in Bulgaria and surveillance measures (1991-2000) by Kurdova R.I., Vutchev D.I. and Petrov P.P. Kurdova_153_162.pdf