Determination of estrogens (estriol, beta-estradiol, estrone and 17 beta-ethynylestradiol) in river water from a rural area in Midwest Brazil - Juliao Zocolo, G. [UNESP]; Cicero de Sousa, A.; Lopes, Márcia Nasser [UNESP]; Rodrigues de Marchi, M. R. [UNESP] (Elsevier B.V., 2010)