TY - JOUR AU - Allison, Bruce N. AU - Gao, Yun TI - Central Quotients and Coverings of Steinberg Unitary Lie Algebras JO - Canadian journal of mathematics PY - 1996 SP - 449 EP - 482 VL - 48 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1996-023-6/ DO - 10.4153/CJM-1996-023-6 ID - 10_4153_CJM_1996_023_6 ER -