TY - JOUR AU - Michael G. Eastwood TI - Symmetries and Invariant Differential Pairings JO - Symmetry, integrability and geometry: methods and applications PY - 2007 VL - 3 UR - http://geodesic.mathdoc.fr/item/SIGMA_2007_3_a112/ LA - en ID - SIGMA_2007_3_a112 ER -