"Trapattoni inocente no "caso Coluna"" [Trapattoni innocent in the "Coluna case"] (in Portuguese). Record. 17 March 2005. Archived from the original on 7 November 2021. Retrieved 9 August 2020.
"Trapattoni inocente no "caso Coluna"" [Trapattoni innocent in the "Coluna case"] (in Portuguese). Record. 17 March 2005. Archived from the original on 7 November 2021. Retrieved 9 August 2020.
Jamie Rainbow (3 August 2013). "A potted history of Benfica". World Soccer. Archived from the original on 17 November 2015. Retrieved 19 September 2015.
Jamie Rainbow (3 August 2013). "A potted history of Benfica". World Soccer. Archived from the original on 17 November 2015. Retrieved 19 September 2015.