EN 14012 : postal services: quality of service: measurement of complaints and redress procedures / European Committee for Standardization
Postal services [documento electrónico] : quality of service: measurement of loss of registered mail and other types of postal service using a track and trace system: EN 14137: September 2003 / European Committee for Standardization
EN 14508 [documento electrónico] : postal services: quality of service: measurement of the transit time of end-to-end services for single piece non-priority mail and second class mail / European Committee for Standardization
EN 45020 : 1998 : standardization and related activities