@article{articledf0b624f,
title   = {An intrinsic approach to the geodesical connectedness of stationay Lorentzian manifolds},
author = {Giannoni, Fabio and Piccione, Paolo},
year = {1999},
doi = {10.4310/cag.1999.v7.n1.a6},
journal   = {Comunications in Analysis and Geometry}
}