Molinero-Gerbeau, Yoan, și Gennaro Avallone. „Migration and Labour Force Needs in Contemporary Agriculture: What Drives States to Implement Temporary Programs? A Comparison Among the Cases of Huelva, Lleida (Spain) and Piana Del Sele (Italy)”. Calitatea Vieții, vol. 29, nr. 1, martie 2018, pp. 3–22, https://revistacalitateavietii.ro/journal/article/view/161.