@article{MAN_1973__203_162452,
     author = {Oldrich Kowalski},
     title = {On the {Gauss-Kronecker} {Curvature} {Tensors.}},
     journal = {Mathematische Annalen},
     pages = {335--343},
     publisher = {mathdoc},
     volume = {203},
     year = {1973},
     zbl = {0241.53026},
     url = {http://geodesic.mathdoc.fr/item/MAN_1973__203_162452/}
}