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Exchange of sulfur pollution between Bulgaria and Greece.
Syrakov D, Prodanova M, Ganev K, Zerefos C, Vasaras A. Syrakov D, et al. Among authors: zerefos c. Environ Sci Pollut Res Int. 2002;9(5):321-6. doi: 10.1007/BF02987575. Environ Sci Pollut Res Int. 2002. PMID: 12391807