@article{JLT_2005_15_1_JLT_2005_15_1_a9,
     author = {R. J. Alonso-Blanco and D. Bl�zquez-Sanz },
     title = {The {Only} {Global} {Contact} {Transformations} of {Order} {Two} or {More} are {Point} {Transformations}},
     journal = {Journal of Lie theory},
     pages = {135--143},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {2005},
     url = {http://geodesic.mathdoc.fr/item/JLT_2005_15_1_JLT_2005_15_1_a9/}
}