ECE/TRANS/WP.29/GRSG/2010/10/Rev.1, ECE/TRANS/WP.29/GRSG/2010/23 and ECE/TRANS/WP.29/GRSG/2010/26, and Informal document No. GRSG-97-08-Rev.1
Documents: ECE/TRANS/WP.29/GRSG/2010/10/Rev.1, ECE/TRANS/WP.29/GRSG/ 2010/23, ECE/TRANS/WP.29/GRSG/2010/26; document informel no GRSG-97-08-Rev.1.