V. Nunes, P. Fernandes, V. Alves, and G. Rodrigues.
" Variability Management of Reliability Models in Software Product Lines: An Expressiveness and Scalability Analysis", in <em>Anais do VI Simpósio Brasileiro de Componentes, Arquiteturas e Reutilização de Software</em>, Natal/RN, 2012, pp.  51-6.