Ana Carina M. Almeida Renata Souza Gibeon Aquino Silvio Romero de Lemos Meira Effort Drivers Estimation for Brazilian Geographically Distributed Software Development. 60-65 2009 SEAFOOD http://dx.doi.org/10.1007/978-3-642-02987-5_8 conf/seafood/2009 db/conf/seafood/seafood2009.html#AlmeidaSAM09