A Sufficient Condition for Further Reduction of Unknowns in the Einstein-Maxwell Field Equations in the Case of the Characteristic [(11)11]
S. Isaak
Indiana University Mathematics Journal
1973
text
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10.1512/iumj.1973.22.22023
10.1512/iumj.1973.22.22023
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Indiana Univ. Math. J. 22 (1973) 287 - 292
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