@article{10_4064_ap83_1_6,
     author = {W. M. Mikulski},
     title = {Natural operators lifting functions to affinors
 on higher order cotangent bundles},
     journal = {Annales Polonici Mathematici},
     pages = {49--55},
     publisher = {mathdoc},
     volume = {83},
     number = {1},
     year = {2004},
     doi = {10.4064/ap83-1-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap83-1-6/}
}