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Gravena, Waleska; Farias, Izeni P.; Silva, Maria N. F. da; Silva, Vera M. F. da; Hrbek, Tomas. "Looking to the past and the future: were the Madeira River rapids a geographical barrier to the boto (Cetacea: Iniidae)?". Conservation Genetics (ingilis). 15 (3). 2014-06-01: 619–629. doi:10.1007/s10592-014-0565-4. ISSN1566-0621.