Riechers, Dominik A. & Walter, Fabian & Carilli, Christopher L. & Lewis, Geraint F.: Imaging The Molecular Gas in a z = 3.9 Quasar Host Galaxy at 0farcs3 Resolution: A Central, Sub-Kiloparsec Scale Star Formation Reservoir in APM 08279+5255. The Astrophysical Journal, 2009, 690. vsk, nro 1, s. 463–485. doi:10.1088/0004-637X/690/1/463Artikkelin verkkoversio. Viitattu 21.11.2018 (englanniksi).
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Riechers, Dominik A. & Walter, Fabian & Carilli, Christopher L. & Lewis, Geraint F.: Imaging The Molecular Gas in a z = 3.9 Quasar Host Galaxy at 0farcs3 Resolution: A Central, Sub-Kiloparsec Scale Star Formation Reservoir in APM 08279+5255. The Astrophysical Journal, 2009, 690. vsk, nro 1, s. 463–485. doi:10.1088/0004-637X/690/1/463Artikkelin verkkoversio. Viitattu 21.11.2018 (englanniksi).