@article{AUPO_2000__39_1_a0,
     author = {Araujo, Jos\'e and Keilhauer, Guillermo},
     title = {Natural tensor fields of type $(0,2)$ on the tangent and cotangent bundles of a {semi-Riemannian} manifold},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {--16},
     publisher = {mathdoc},
     volume = {39},
     number = {1},
     year = {2000},
     mrnumber = {1826349},
     zbl = {1056.53043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_2000__39_1_a0/}
}