@article{SIGMA_2005_1_a5,
     author = {O. I. Morozov},
     title = {Structure of {Symmetry} {Groups} via {Cartan's} {Method:} {Survey} of {Four} {Approaches}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2005},
     volume = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2005_1_a5/}
}