1. Expatica: Retire in Portugal as an expat: a guide for expatriate retirees 

  2. SmartAsset.com: How to Retire in Portugal

  3. Investopedia.com: Four Retirement Cities in Portugal

  4. GoToPortugal.eu: Retire in Portugal and choose where to live in this amazing country

  5. InternationalLiving.com: Retire In Portugal

  6. BePortugal.com: How to Retire in Portugal: A Complete Guide for Expats

  7. Money.USNews.com: How to Retire in Portugal