@article{10_21136_MB_1993_126052,
     author = {Mikulski, W. M.},
     title = {Natural differential operators between some natural bundles},
     journal = {Mathematica Bohemica},
     pages = {153--161},
     publisher = {mathdoc},
     volume = {118},
     number = {2},
     year = {1993},
     doi = {10.21136/MB.1993.126052},
     mrnumber = {1223480},
     zbl = {0777.58004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1993.126052/}
}