Speller, Marcus; Moore, Luke; Donaldson, Pete; Campbell, Jim; Limited, The Football Ramble (2016). The Football Ramble. Random House. ISBN9781473537965 – via Google Books.
Tomaz, João (11 May 2022). "Morreu a maldição que nunca existiu" [The curse that never existed has died]. S.L. Benfica (in Portuguese). Retrieved 23 May 2022.