The ROSAT deep survey - VII. RX J105343+5735: A massive cluster at 1.263D. Thompson, L. Pozzetti, G. Hasinger, I. Lehmann, M. Schmidt, B. T. Soifer, G. Szokoly, G. Wilson and G. ZamoraniA&A, 377 3 (2001) 778-783DOI: https://doi.org/10.1051/0004-6361:20011049