C. P. Pereira and J. F. Azevedo,  "The Fourth wave of Portuguese emigration: Austerity policies, European peripheries and postcolonial continuities", in New and old routes of Portuguese emigration: Uncertain futures at the periphery of Europe, Cláudia Pereira, Joana Azevedo, Ed., Cham, Springer, 2019, pp. 1-26