@article{JOLT_2010_20_2_a7,
     author = {Renat Zhdanov},
     title = {On a {Lie} {Group} {Characterization} of {Quasi-Local} {Symmetries} of {Nonlinear} {Evolution} {Equations}},
     journal = {Journal of Lie Theory},
     pages = {375--392},
     year = {2010},
     volume = {20},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2010_20_2_a7/}
}