Twistor connection and normal conformal Cartan connection Helmut Friedrich Research Articles Pages: 303 - 312
Quadrupole test particle as a detector of gravitational waves Risto Tammelo Research Articles Pages: 313 - 319
Conformal changes of metrics and the initial-value problem of general relativity Eckehard W. Mielke Research Articles Pages: 321 - 345
On Shirokov's “One New Effect of the Einsteinian theory of Gravitation” A. Nduka Research Articles Pages: 347 - 351
On the propagation of photons and neutrinos in curved space-time J. B. Griffiths Research Articles Pages: 365 - 370