@article{05904713,
title = {Tangent sphere bundles of natural diagonal lift type.},
journal = {Balkan Journal of Geometry and its Applications (BJGA)},
volume = {15},
year = {2010},
pages = {53-67},
zbl = {1217.53030},
language = {en},
url = {http://dml.mathdoc.fr/item/05904713}
}
Druţă, S.L.; Oproiu, V. Tangent sphere bundles of natural diagonal lift type.. Balkan Journal of Geometry and its Applications (BJGA), Tome 15 (2010) pp. 53-67. http://gdmltest.u-ga.fr/item/05904713/