@article{SEMR_2014_11_a27,
     author = {V. N. Zhelyabin and M. E. Goncharov},
     title = {An example of differentially simple {Lie} algebra which is not a free module over its centroid},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {915--920},
     publisher = {mathdoc},
     volume = {11},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2014_11_a27/}
}