Ferraz R., in Portugal Duarte A. „Economic Growth and Public Indebtedness in the Last Four Decades: Is Portugal Different from the Other PIIGS’ Economies?“. Naše gospodarstvo/Our Economy, Let. 61, št. 6, julij 2015., str. 3-11, https://old.journals.um.si/index.php/oe/article/view/2245.