TY - JOUR AU - Mikhail B. Sheftel AU - Andrei A. Malykh TI - Partner Symmetries, Group Foliation and ASD Ricci-Flat Metrics without Killing Vectors JO - Symmetry, integrability and geometry: methods and applications PY - 2013 VL - 9 UR - http://geodesic.mathdoc.fr/item/SIGMA_2013_9_a74/ LA - en ID - SIGMA_2013_9_a74 ER -