https://ec.europa.eu/research/evaluations/pdf/archive/other_reports_studies_and_documents/hlg_2017_report.pdf
https://progressivepost.eu/can-we-have-a-political-debate-on-the-economic-union-we-want/
https://www.confindustria.it/notizie/dettaglio-notizie/lettera-Confindustria-Medef-ai-presidenti-di-Italia-e-Francia