1. Variational principle for gravitational equations of the Bianchi identity type

   • Tsunehiro Obata
   • Jiro Chiba

   Research Articles Pages: 547 - 555

2. Some remarks on the nonlinear graviton

   • W. D. Curtis
   • D. E. Lerner
   • F. R. Miller

   Research Articles Pages: 557 - 565

3. General relativity as a generalized Hamiltonian system

   • Demetrios Christodoulou
   • Mauro Francaviglia
   • Wlodzimierz M. Tulczyjew

   Research Articles Pages: 567 - 579

4. Relativistic effects in many-body systems of finite size, internal structure, and internal motions: I. “Self-acceleration” of astrophysical systems

   • N. Spyrou

   Research Articles Pages: 581 - 598

5. Lorentz-Covariant theory of gravitation

   • Walter Petry

   Research Articles Pages: 599 - 608

6. Energy and momentum in general relativity

   • S. Persides

   Research Articles Pages: 609 - 622

7. Momentum transfer in gravitation theory

   • T. N. Palmer

   Research Articles Pages: 623 - 629

8. On an exact classical wave solution of the Einstein equations

   • Patrício S. Letelier

   Research Articles Pages: 631 - 632

9. Pregalactic black holes: A new constraint

   • John D. Barrow
   • Joseph Silk

   Research Articles Pages: 633 - 638