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↑ Chiavassa; Lacour; Millour; Driebe; Wittkowski; Plez; Thiebeaut; Josselin et al. (2009). “VLTI/AMBER spectro-interferometric imaging of VX Sgr's inhomogenous outer atmosphere”. Astronomy and Astrophysics 511: A51. arXiv:0911.4422. Bibcode: 2010A&A...511A..51C. doi:10.1051/0004-6361/200913288.