XP South of the Equator: An eXPerience Implementing XP in Brazil. - Alexandre Freire da Silva; Fabio Kon; Cicero Torteli (XP, 2005)

Prototypes Are Forever Evolving from a Prototype Project to a Full-Featured System. - Hugo Corbucci; Mariana V. Bravo; Alexandre Freire da Silva; Fernando Freire da Silva (XP, 2010)