@article{JLT_2010_20_2_JLT_2010_20_2_a7,
     author = {R. Zhdanov },
     title = {On a {Lie} {Group} {Characterization} of {Quasi-Local} {Symmetries} of {Nonlinear} {Evolution} {Equations}},
     journal = {Journal of Lie theory},
     pages = {375--392},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/JLT_2010_20_2_JLT_2010_20_2_a7/}
}