Santos, M., J. Oshima, and E. Silva. “Sightings of Franciscana Dolphins (pontoporia Blainvillei): The Discovery of a Population in the Paranaguá Estuarine Complex, Southern Brazil”. Brazilian Journal of Oceanography, Vol. 57, no. 1, Mar. 2009, pp. 57-63, doi:10.1590/S1679-87592009000100006.