Diatom diversity and ecological status of the Lasovačka and Lenovačka streams near Zaječar: consideration of WFD implementation in Serbia. - Ćirić, Miloš; Nikolić, Nataša; Krizmanić, Jelena; Gavrilović, Bojan; Pantelić, Ana; Petrović, Vladimir M. (Archives of Biological Sciences, 2018)