https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef18036en.pdf
https://www.iso.org/files/live/sites/isoorg/files/store/en/PUB100470.pdf
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef22029en.pdf
https://www.usaid.gov/sites/default/files/2023-03/Policy%20Framework%2003-23-2023.pdf