Fragoso, Garrido (29 March 2012). "Angola protela adopção do Acordo Ortográfico" [Angola defers adoption of Orthographic Agreement] (in Portuguese). Luanda, Angola: Jornal de Angola. Archived from the original on 29 March 2012. Retrieved 29 March 2012.
Monteiro, Luciano O. (n.d.) [Originally published in the May 2009 issue of the ITI Bulletin]. "This Could Spell Trouble". Deletra Translations. Retrieved 3 August 2022.
Fragoso, Garrido (29 March 2012). "Angola protela adopção do Acordo Ortográfico" [Angola defers adoption of Orthographic Agreement] (in Portuguese). Luanda, Angola: Jornal de Angola. Archived from the original on 29 March 2012. Retrieved 29 March 2012.