Ramos, Abel (11 September 2011). "Primeira derrota da época para o Olhanense" [First defeat of the season for Olhanense]. Folha do Domingo (in Portuguese). Retrieved 15 July 2020.
Sousa Martins, André (28 June 2015). "Salvador Agra quatro anos no Nacional" [Salvador Agra four years in Nacional] (in Portuguese). Mais Futebol. Retrieved 9 June 2016.