@article{10_21136_CMJ_1982_101823,
     author = {Jany\v{s}ka, Josef},
     title = {On the {Lie} algebra of vertical prolongation operators},
     journal = {Czechoslovak Mathematical Journal},
     pages = {481--487},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {1982},
     doi = {10.21136/CMJ.1982.101823},
     mrnumber = {669789},
     zbl = {0518.58001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1982.101823/}
}