Cyanobacteria and Cyanotoxin in the Billings Reservoir (Sâo Paulo, SP, Brazil) - Moschini-Carlos, Viviane (Sao Paulo State University (Brasil). Department of Environmental Engineering) ; Bortoli, Stella (University of Sao Paulo (Brasil). School Pharmaceutical Sciences) ; Pinto, Ernani (University of Sao Paulo (Brasil). School Pharmaceutical Sciences) ; Nishimura, Paula Yuri (University of Sao Paulo (Brasil). Department of Ecology) ; Gomes de Freitas, Leandro (Sao Paulo State University (Brasil). Department of Environmental Engineering) ; Pompêo, Marcelo L. M. (University of Sao Paulo (Brasil). Department of Ecology) ; Dörr, Felipe (University of Sao Paulo (Brasil). School Pharmaceutical Sciences)