Havukainen, L., Leite de Araujo Monteiro Filho, E. and de Fatima Filla, G. (2011) “Population density of Sotalia guianensis (Cetacea: Delphinidae) in the Cananéia region, Southeastern Brazil”, Revista de Biología Tropical, 59(3), pp. 1275–1284. doi: 10.15517/rbt.v0i0.3398.