
https://towardsdatascience.com/create-dumbbell-plots-to-visualize-group-differences-in-r-3536b7d0a19a

https://blogs.lse.ac.uk/europpblog/2024/07/08/what-the-rise-of-chega-means-for-portuguese-democracy/

https://www.socialeurope.eu/wp-content/uploads/2017/08/Occ-Pap-13-PDF.pdf