@article{10_4153_CMB_2009_054_5,
     author = {Daigle, Daniel and Kaliman, Shulim},
     title = {A {Note} on {Locally} {Nilpotent} {Derivations} and {Variables} of {k[X,} {Y,} {Z]}},
     journal = {Canadian mathematical bulletin},
     pages = {535--543},
     year = {2009},
     volume = {52},
     number = {4},
     doi = {10.4153/CMB-2009-054-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2009-054-5/}
}