Microcystin production by Radiocystis fernandoi (Chroococcales, Cyanobacteria) isolated from a drinking water reservoir in the city of Belem, PA, Brazilian Amazonia region - Vieira, José Maria dos Santos; Azevedo, Maria Tereza de P.; Azevedo, S. M. de Oliveira; Honda, R. Y.; Corrêa, Benedito (Toxicon,, 2003)