ECE/TRANS/WP.29/GRSP/47, paras. 27 and 28, ECE/TRANS/WP.29/GRSP/2009/15, ECE/TRANS/WP.29/GRSP/2009/23, ECE/TRANS/WP.29/GRSP/2009/24, (ECE/TRANS/WP.29/GRSP/2010/23)
Documents: ECE/TRANS/WP.29/GRSP/47, par. 27 et 28, ECE/TRANS/WP.29/GRSP/2009/15, ECE/TRANS/WP.29/GRSP/2009/23, ECE/TRANS/WP.29/GRSP/2009/24 et (ECE/TRANS/WP.29/GRSP/2010/23).