CEN/TR 14709 [documento electrónico] : postal services: quality of service: guide for the implementation of EN 13850 / European Committee for Standardization
CEN/TR 15369 [documento electrónico] : postal services: quality of service: guide for the implementation of EN 14534 measurement of the transit time of enf-to-end services for bulk mail / European Committee for Standardization
CEN/TR 15472 [documento electrónico] : postal services: measurement of transit times for parcels by the use of a track and trace system / European Committee for Standardization