Cunha, H.A., V.M.F. da Silva, J. Lailson-Brito Jr., M.C.O. Santos, P.A.C. Flores, A.R. Martin, A.F. Azevedo, A.B.L. Fragoso, R.C. Zanelatto, and A.M. Solé-Cava. Riverine and marine ecotypes of Sotalia dolphins are different species (англ.) // Marine Biology : journal. — 2005. — Vol. 148, no. 2. — P. 449—457. — doi:10.1007/s00227-005-0078-2.
Caballero, S., F. Trujillo, J. A. Vianna, H. Barrios-Garrido, M. G. Montiel, S. Beltrán-Pedreros, M. Marmontel, M. C. Santos, M. R. Rossi-Santos, F. R. Santos, and C. S. Baker. Taxonomic status of the genus Sotalia: species level ranking for "tucuxi" (Sotalia fluviatilis) and "costero" (Sotalia guianensis) dolphins (англ.) // Marine Mammal Science : journal. — 2007. — Vol. 23, no. 2. — P. 358—386. — doi:10.1111/j.1748-7692.2007.00110.x.