R Wojtak et al. Nature 477 , 567 - 569 (2011) doi:10.1038/nature10445
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R Wojtak et al. Nature 477, 567-569 (2011) doi:10.1038/nature10445 Constraints on gravitational redshift in galaxy clusters.
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Constraints on gravitational redshift in galaxy clusters. R Wojtak et al. Nature 477 , 567 - 569 (2011) doi:10.1038/nature10445. - PowerPoint PPT Presentation