https://www.cecimo.eu/wp-content/uploads/2022/01/OP0122_Paper.pdf
https://www.goldmansachs.com/pdfs/insights/pages/gs-research/the-path-to-2075-slower-global-growth-but-convergence-remains-intact/report.pdf
https://trade.ec.europa.eu/doclib/docs/2021/september/tradoc_159803.pdf
https://sosapadilla.github.io/files/papers/Bianchi_Sosa-Padilla_PP.pdf