共 31 条
- [1] Bel L., 1962, CAHIERS PHYS, V16, P59
- [3] Einstein spaces which are mapped conformally on each other [J]. MATHEMATISCHE ANNALEN, 1925, 94 : 119 - 145
- [6] INVARIANT 2-SPACES AND CANONICAL FORMS FOR THE RICCI TENSOR IN GENERAL RELATIVITY [J]. JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1979, 12 (01): : 55 - 62
- [8] GOLDBERG JN, 1961, J MATH PHYS, V2, P328
- [10] CLASSIFICATION OF RICCI TENSOR IN GENERAL RELATIVITY THEORY [J]. JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1976, 9 (04): : 541 - 545