@article{ARM_2008__44_5_a5,
     author = {Kowalski, Old\v{r}ich and Sekizawa, Masami},
     title = {On {Riemannian} geometry of tangent sphere bundles with arbitrary constant radius},
     journal = {Archivum mathematicum},
     pages = {391--401},
     publisher = {mathdoc},
     volume = {44},
     number = {5},
     year = {2008},
     mrnumber = {2501575},
     zbl = {1212.53043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2008__44_5_a5/}
}