
https://www.gov.uk/government/news/covid-19-sales-and-pricing-practices-during-coronavirus-outbreak

https://gupea.ub.gu.se/bitstream/2077/62155/1/gupea_2077_62155_1.pdf

https://commission.europa.eu/system/files/2023-06/COM_2023_311_1_EN_annexe_autre_acte_part1_v7.pdf