@article{EUG_1995_44_a3,
     author = {Oldrich Kowalski and  Masami Sekizawa},
     title = {On the {Scalar} {Curvature} of {Tangent} sphere bundles with {Arbitary} {Constant} {Radius}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {17--30},
     year = {1995},
     volume = {44},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1995_44_a3/}
}