1. Naked singularities in a self-similar Tolman-Bondi spacetime

   • A. Sil
   • S. Chatterjee

   OriginalPaper Pages: 775 - 786

2. Vacuum spacetimes with a two-dimensional orthogonally transitive group of homothetic motions

   • Charalampos Kolassis

   OriginalPaper Pages: 787 - 804

3. Perfect fluid space-times with a two-dimensional orthogonally transitive group of homothetic motions

   • Ch. Kolassis
   • J. B. Griffiths

   OriginalPaper Pages: 805 - 832

4. Euclidean action, nucleation energy and the dimensionality of space-time

   • Franz Embacher

   OriginalPaper Pages: 833 - 841

5. Critical behavior of extremal Kerr-Newman black holes

   • Osamu Kaburaki

   OriginalPaper Pages: 843 - 854

6. On a Fermat principle in general relativity. A Morse theory for light rays

   • Fabio Giannoni
   • Antonio Masiello

   OriginalPaper Pages: 855 - 897

7. How should we measure spatial distances?

   • Hans -Jürgen Schmidt

   Letter Pages: 899 - 903