@article{10_21136_MB_1999_125998,
     author = {Thompson, G.},
     title = {Killing's equations in dimension two and systems of finite type},
     journal = {Mathematica Bohemica},
     pages = {401--420},
     publisher = {mathdoc},
     volume = {124},
     number = {4},
     year = {1999},
     doi = {10.21136/MB.1999.125998},
     mrnumber = {1722875},
     zbl = {0952.70014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1999.125998/}
}