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Trapped null geodesies in a rotating interior metric P. CollasJ. K. Lawrence Research Articles Pages: 715 - 729
A background-dependent approach to the theory of gravitation Riccardo Goldoni Research Articles Pages: 731 - 741
A background-dependent approach to the theory of gravitation II. Relativistic gravitational equations Riccardo Goldoni Research Articles Pages: 743 - 755
Equations of motion in the null formalism J. N. GoldbergP. Silaban Research Articles Pages: 757 - 766