http://www.congreso.es/consti/constitucion/indice/titulos/articulos.jsp?ini=155&tipo=2
http://www.etui.org/Publications2/Working-Papers/Why-central-and-eastern-Europe-needs-a-pay-rise
https://www.bruegel.org/sites/default/files/2022-09/PC%2014%202022_3.pdf
https://www.socialeurope.eu/why-it-seems-east-germany-is-everywhere