T. I. de Mattos, F. L. Ortale, R. M. L. Fornasier, and V. Corrias, “Input and authorship in the production of teaching materials of Italian as heritage language”, Rev. Ital. (Online), no. 36, pp. 47–57, Dec. 2018, doi: 10.11606/issn.2238-8281.i36p47-57.