@article{MOMA_1991__111_1_178507,
     author = {Jacek Gancarzewicz and Ivan Kol\'ar},
     title = {Some {Gauge} {Natural} {Operators} on {Linear} {Connections.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {23--34},
     publisher = {mathdoc},
     volume = {111},
     number = {1},
     year = {1991},
     zbl = {0722.53020},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1991__111_1_178507/}
}