ERGP report on the future needs of the USO [documento eletrónico] / European Regulators Group for Postal Services
ERGP report on the application of the cross-border parcel regulation [documento eletrónico] / European Regulators Group for Postal Services
State of the postal sector 2023 [documento eletrónico] : a hyper-collaborative path to postal development / Universal Postal Union
e-Commerce report 2023 [documento eletrónico] / Correios de Portugal
Statistique des services postaux 2022 [documento eletrónico] / Union Postale Universelle