Postal services [documento electrónico] : quality of service: measurement of the transit time of end-to-end services for single piece priority mail and first class mail: EN 13850: Mai 2002 / European Committee for Standardization
EN 14012 : postal services: quality of service: measurement of complaints and redress procedures / European Committee for Standardization
Postal services [documento electrónico] : address databases: part 1: components of postal addresses: EN 14142-1: February 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