@article{SIGMA_2013_9_a74,
     author = {Mikhail B. Sheftel and Andrei A. Malykh},
     title = {Partner {Symmetries,} {Group} {Foliation} and {ASD} {Ricci-Flat} {Metrics} without {Killing} {Vectors}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2013},
     volume = {9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2013_9_a74/}
}