https://researchbriefings.files.parliament.uk/documents/CBP-9255/CBP-9255.pdf
https://www.capgemini.com/consulting/wp-content/uploads/sites/30/2017/11/2017-egovernment-benchmark-insight1.pdf
https://unesdoc.unesco.org/ark:/48223/pf0000380618/PDF/380618eng.pdf.multi
https://publications.parliament.uk/pa/cm201719/cmselect/cmcumeds/366/366.pdf