@article{10_1007_s10587_013_0011_7,
     author = {Kol\'a\v{r}, Ivan},
     title = {On special types of semiholonomic $3$-jets},
     journal = {Czechoslovak Mathematical Journal},
     pages = {165--175},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {2013},
     doi = {10.1007/s10587-013-0011-7},
     mrnumber = {3035504},
     zbl = {1274.58001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10587-013-0011-7/}
}