@article{RSM_2005__63_3_129105,
     author = {Kowalski, O. and Sekizawa, M.},
     title = {On curvatures of linear frame bundles with naturally lifted metrics.},
     journal = {Rendiconti del seminario matematico},
     pages = {283--295},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {2005},
     zbl = {1141.53020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RSM_2005__63_3_129105/}
}