A. A. Mignucci-Giannoni, C. Iglesias-Escabí, R. J. Rosario-Delestre, and M. Alsina-Guerrero, “Variation in the distribution of the Antillean manatee (Trichechus manatus manatus) on the southern coast of Puerto Rico through helicopter aerial surveys”, Rev. Cien. Mar. Cost., vol. 10, no. 1, pp. 97–121, May 2018, doi: 10.15359/revmar10-1.6.