TY - JOUR AU - Henrik Aratyn AU - Johan van de Leur TI - Clifford Algebra Derivations of Tau-Functions for Two-Dimensional Integrable Models with Positive and Negative Flows JO - Symmetry, integrability and geometry: methods and applications PY - 2007 VL - 3 UR - http://geodesic.mathdoc.fr/item/SIGMA_2007_3_a19/ LA - en ID - SIGMA_2007_3_a19 ER -