Null geodesics in black hole metrics with non-zero cosmological constant Zdenek StuchlikMassimo Calvani Research Articles Pages: 507 - 519
Null charts and naked singularities in spherically symmetric, homothetic spacetimes R. N. HenriksenKanan Patel Research Articles Pages: 527 - 581
The frequency of light propagating in gravitational wave spacetimes V. Faraoni Research Articles Pages: 583 - 597
A BRST-like operator for space with zero curvature but non-zero torsion tensor Susumu Okubo Research Articles Pages: 599 - 605
Gravity, holonomy and light-cone cuts Carlos KozamehEzra T. Newman Research Articles Pages: 607 - 613