ECE/TRANS/WP.30/AC.2/2010/7, ECE/TRANS/WP.30/AC.2/2010/13, Informal document No. 9 (2010), ECE/TRANS/WP.30/AC.2/2011/5.
Documents: ECE/TRANS/WP.30/AC.2/2010/7, ECE/TRANS/WP.30/AC.2/2010/13, document informel no 9 (2010) et ECE/TRANS/WP.30/AC.2/2011/5.