Microbial communities in an oligotrophic reservoir influenced by high levels of ionizing radiation - Ronqui, Leilane Barbosa; Azevedo, H; Seleghim, Mirna Helena Regali; Ferrari, C. R; Rodgher, S; Macacini, J. F; Roque, C. V; Mourão, G. B; Nascimento, M. R. L (Radioprotection, 2011)