@article{10_1007_s10587_011_0004_3,
     author = {Mikulski, W. M.},
     title = {On symmetrization of jets},
     journal = {Czechoslovak Mathematical Journal},
     pages = {157--168},
     publisher = {mathdoc},
     volume = {61},
     number = {1},
     year = {2011},
     doi = {10.1007/s10587-011-0004-3},
     mrnumber = {2782766},
     zbl = {1224.58001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10587-011-0004-3/}
}