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H. C. Woodruff, M. Eberhardt, T. Driebe, K.-H. Hofmann: Interferometric observations of the Mira star o Ceti with the VLTI/VINCI instrument in the near-infrared. In: Astronomy & Astrophysics. 421. Jahrgang, Nr.2, 2004, S.703–714, doi:10.1051/0004-6361:20035826, arxiv:astro-ph/0404248, bibcode:2004A&A...421..703W.
H. C. Woodruff, M. Eberhardt, T. Driebe, K.-H. Hofmann: Interferometric observations of the Mira star o Ceti with the VLTI/VINCI instrument in the near-infrared. In: Astronomy & Astrophysics. 421. Jahrgang, Nr.2, 2004, S.703–714, doi:10.1051/0004-6361:20035826, arxiv:astro-ph/0404248, bibcode:2004A&A...421..703W.
H. C. Woodruff, M. Eberhardt, T. Driebe, K.-H. Hofmann: Interferometric observations of the Mira star o Ceti with the VLTI/VINCI instrument in the near-infrared. In: Astronomy & Astrophysics. 421. Jahrgang, Nr.2, 2004, S.703–714, doi:10.1051/0004-6361:20035826, arxiv:astro-ph/0404248, bibcode:2004A&A...421..703W.