@article{GDZPPN002069253, title = {Root vectors in quantum groups.}, journal = {Commentarii mathematici Helvetici}, volume = {69}, year = {1994}, pages = {612-639}, zbl = {0822.17006}, url = {http://dml.mathdoc.fr/item/GDZPPN002069253} }
Xi, Nanhua. Root vectors in quantum groups.. Commentarii mathematici Helvetici, Tome 69 (1994) pp. 612-639. http://gdmltest.u-ga.fr/item/GDZPPN002069253/