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An unusually strong Einstein ring in the radio source PKS1830–211
Jauncey, D. L., Reynolds, J. E., Tzioumis, A. K., Muxlow, T. W. B., Perley, R. A., Murphy, D. W., Preston, R. A., King, E. A., Patnaik, A. R., Jones, D. L.Volume:
352
Year:
1991
Pages:
3
DOI:
10.1038/352132a0
File:
PDF, 577 KB
1991