The implementation is based on the pseudocode in an Interim European Telecommunication Standard,
prI-ETS 300 036
which is not available in electronic form, but can be ordered (for around 70 ECU) from the
ETSI (European Telecommunications Standards Institute)

ETSI Secretariat: B.P.152
F-06561 Valbonne Cedex
France

Phone: +33 92 94 42 00
Fax: +33 93 65 47 16
Telex: 47 00 40 F

The ETSI home page on the world wide web can be found at http://www.etsi.org/.