@article{SIGMA_2010_6_a75,
     author = {Vladimir V. Kisil},
     title = {Erlangen {Program} at {Large-1:} {Geometry} of {Invariants}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2010},
     volume = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2010_6_a75/}
}