Public transport – Communication between contactless readers and fare media – Part 1: Implementation requirements for ISO/IEC 14443; English version CEN/TS 16794-1:2017
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 09/01/2017

Public transport – Communication between contactless readers and fare media – Part 1: Implementation requirements for ISO/IEC 14443; English version CEN/TS 16794-1:2015
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2015