TY - JOUR AU - W. Bertram AU - J. Hilgert TI - Characterization of the Kantor-Koecher-Tits Algebra by a Generalized Ahlfors Operator JO - Journal of Lie Theory PY - 2001 SP - 415 EP - 426 VL - 11 IS - 2 UR - http://geodesic.mathdoc.fr/item/JOLT_2001_11_2_a6/ ID - JOLT_2001_11_2_a6 ER -