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- [1] NULL ELECTROMAGNETIC FIELDS IN GENERAL RELATIVITY THEORY PHYSICAL REVIEW, 1960, 118 (04): : 1105 - 1110
- [3] INVARIANT CHARACTERIZATION FOR NULL ELECTROMAGNETIC-FIELDS IN GENERAL-RELATIVITY CURRENT SCIENCE, 1979, 48 (14): : 625 - 625
- [5] NONSTATIC ELECTROMAGNETIC FIELDS IN GENERAL RELATIVITY NUOVO CIMENTO A, 1967, 47 (03): : 568 - +
- [8] HOMOGENEOUS NONSTATIC ELECTROMAGNETIC FIELDS IN GENERAL RELATIVITY NUOVO CIMENTO, 1965, 36 (01): : 109 - +
- [9] BIRKHOFFS THEOREM FOR ELECTROMAGNETIC FIELDS IN GENERAL RELATIVITY PROGRESS OF THEORETICAL PHYSICS, 1960, 24 (04): : 915 - 916
- [10] ON THE NULL EINSTEIN-MAXWELL FIELDS IN GENERAL-RELATIVITY INDIAN JOURNAL OF PURE & APPLIED MATHEMATICS, 1981, 12 (02): : 265 - 269