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R. Rampazzo, L. Reduzzi, J. W. Sulentic et R. Madejski, « Mixed Pairs: Interaction Effects in NGC 5296/7 », Observational Cosmology. Astronomical Society of the Pacific Conference Series, vol. 51, , p. 290-291 (Bibcode1993ASPC...51..290R, lire en ligne [PDF])