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- [4] X-ray and optical observations of three clusters of galaxies: Abell 901, Abell 1437, and Abell 3570 ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 2000, 142 (03): : 433 - 441
- [5] Detection of hot gas in the filament connecting the clusters of galaxies Abell 222 and Abell 223 ASTRONOMY & ASTROPHYSICS, 2008, 482 (03): : L29 - L33