Postal services [documento electrónico] : forms: harmonised vocabulary: ENV 13712: April 2000 / European Committee for Standardization
Postal services [documento electrónico] : apertures of private letter boxes and letter plates: requirements and test methods: EN 13724: November 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] : 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