TY - JOUR AU - Nanhua Xi TI - Root vectors in quantum groups. JO - Commentarii mathematici Helvetici PY - 1994 SP - 612 EP - 639 VL - 69 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMH_1994__69_4_140356/ ID - CMH_1994__69_4_140356 ER -