Reference documents
ISO 6789 - ISO 6789:2003 - Third edition 2003-04-01
ISO 6789 - ISO 6789-2:2017 - First edition 2017-02
ISO 5393 - ISO 5393:1994 - Second edition 1994-05-01
CNOMO - CNOMO E41.32.110N – CNOMO - July 1990
VDI/VDE 2645-2 - VDI/VDE 2645-2 - September 2014
JJF 1610-2017 - JJF 1610-2017 - May 2017