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Hillen, M.; Menu, J.; Van Winckel, H.; Min, M.; Gielen, C.; Wevers, T.; Mulders, G. D.; Regibo, S.; Verhoelst, T. (2014). “An interferometric study of the post-AGB binary 89 Herculis. II. Radiative transfer models of the circumbinary disk”. Astronomy & Astrophysics. 568: A12. arXiv:1405.1960. Bibcode:2014A&A...568A..12H. doi:10.1051/0004-6361/201423749. S2CID6700179.
Hillen, M.; Verhoelst, T.; Van Winckel, H.; Chesneau, O.; Hummel, C. A.; Monnier, J. D.; Farrington, C.; Tycner, C.; Mourard, D.; Ten Brummelaar, T.; Banerjee, D. P. K.; Zavala, R. T. (2013). “An interferometric study of the post-AGB binary 89 Herculis. I. Spatially resolving the continuum circumstellar environment at optical and near-IR wavelengths with the VLTI, NPOI, IOTA, PTI, and the CHARA Array”. Astronomy & Astrophysics. 559: A111. arXiv:1308.6715. Bibcode:2013A&A...559A.111H. doi:10.1051/0004-6361/201321616. S2CID119182156.
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Hillen, M.; Verhoelst, T.; Van Winckel, H.; Chesneau, O.; Hummel, C. A.; Monnier, J. D.; Farrington, C.; Tycner, C.; Mourard, D.; Ten Brummelaar, T.; Banerjee, D. P. K.; Zavala, R. T. (2013). “An interferometric study of the post-AGB binary 89 Herculis. I. Spatially resolving the continuum circumstellar environment at optical and near-IR wavelengths with the VLTI, NPOI, IOTA, PTI, and the CHARA Array”. Astronomy & Astrophysics. 559: A111. arXiv:1308.6715. Bibcode:2013A&A...559A.111H. doi:10.1051/0004-6361/201321616. S2CID119182156.
Hillen, M.; Menu, J.; Van Winckel, H.; Min, M.; Gielen, C.; Wevers, T.; Mulders, G. D.; Regibo, S.; Verhoelst, T. (2014). “An interferometric study of the post-AGB binary 89 Herculis. II. Radiative transfer models of the circumbinary disk”. Astronomy & Astrophysics. 568: A12. arXiv:1405.1960. Bibcode:2014A&A...568A..12H. doi:10.1051/0004-6361/201423749. S2CID6700179.