
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef20023en.pdf

http://blog.arbeit-wirtschaft.at/mindestlohn-zufriedenere-beschaeftigte/

http://uk.businessinsider.com/unemployment-in-the-uk-is-now-so-low-its-in-danger-of-exposing-the-lie-used-to-create-the-numbers-2017-7?r=US&IR=T