
https://ec.europa.eu/commission/publications/position-paper-transmitted-eu27-ongoing-police-and-judicial-cooperation-criminal-matters_en

http://www.ladocumentationfrancaise.fr/pages-europe/pe000071-interrogations-sur-l-avenir-de-la-politique-de-cohesion-apres-2020-par-marjorie-jouen/article

http://www.progressives-zentrum.org/wp-content/uploads/2018/03/The-Future-of-the-Visegrad-Group_2018_ebook.pdf