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Setiawan, J.; Roth, M.; Weise, P.; Dölinger, M. P. (2006). "Multi-periodic oscillations of HD 32887 and HD 81797". Memorie della Societa Astronomica Italiana. 77: 510–514. arXiv:astro-ph/0505184. Bibcode:2006MmSAI..77..510S.