1. Null geodesics in black hole metrics with non-zero cosmological constant

   • Zdenek Stuchlik
   • Massimo Calvani

   Research Articles Pages: 507 - 519

2. Duality, strings and inflation

   • E. I. Guendelman

   Research Articles Pages: 521 - 525

3. Null charts and naked singularities in spherically symmetric, homothetic spacetimes

   • R. N. Henriksen
   • Kanan Patel

   Research Articles Pages: 527 - 581

4. The frequency of light propagating in gravitational wave spacetimes

   • V. Faraoni

   Research Articles Pages: 583 - 597

5. A BRST-like operator for space with zero curvature but non-zero torsion tensor

   • Susumu Okubo

   Research Articles Pages: 599 - 605

6. Gravity, holonomy and light-cone cuts

   • Carlos Kozameh
   • Ezra T. Newman

   Research Articles Pages: 607 - 613

7. Book review

   • H. F. M. Goenner

   BookReview Pages: 615 - 617

8. Book review

   • Antoine Folacci

   BookReview Pages: 619 - 620