Raposo, Pedro. "Ilhéu da Praia". SIARAM (Sentir e Intrepretar o Ambiente dos Açores) [Feeling and Interpreting the Environment of the Azores] (in Portuguese). Retrieved 21 May 2020.
Bried, Joël. "Trabalhos de Investigação". SIARAM (Sentir e Intrepretar o Ambiente dos Açores) [Feeling and Interpreting the Environment of the Azores] (in Portuguese). University of the Azores Department of Oceanography and Fisheries. Retrieved 21 May 2020.