Immunization Using a Stochastic-Process Independent Multi-Factor Model: The Portuguese Experience
Jorge Miguel Ventura Bravo, Carlos Manuel Pereira da Silva
Journal of Banking and Finance, vol. 30, 2006, p. 133-156.

The financial sustainability of the portuguese social security system
Carlos Manuel Pereira da Silva, João Paulo Tomé Calado, Maria Teresa Medeiros Garcia
Geneva Papers On Risk And Insurance: Issues And Practice, vol. 29, 2004, p. 417-439.