https://www.brookings.edu/articles/disquiet-in-the-worlds-middle-class/
https://www.agoravox.fr/culture-loisirs/culture/article/rapport-sarr-savoy-l-acquisition-d-209865
https://www.revistacentral.com.mx/cultura/por-que-decimos-que-goya-frida-kahlo-y-velazquez-son-grandes-la-pintura