"Embraer lucra com retrofit de aviões" [Embraer profits from aircraft retrofit], Estadão (in Portuguese), 16 September 2011, archived from the original on 17 September 2011, retrieved 29 January 2012.
"Embraer lucra com retrofit de aviões" [Embraer profits from aircraft retrofit], Estadão (in Portuguese), 16 September 2011, archived from the original on 17 September 2011, retrieved 29 January 2012.