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Kerschbaum, F.; Ladjal, D.; Ottensamer, R.; Groenewegen, M. A. T.; Mecina, M.; Blommaert, J. A. D. L.; Baumann, B.; Decin, L.; Vandenbussche, B.; Waelkens, C.; Posch, T.; Huygen, E.; De Meester, W.; Regibo, S.; Royer, P.; Exter, K.; Jean, C. (2010). "The detached dust shells of AQ Andromedae, U Antliae, and TT Cygni". Astronomy and Astrophysics. 518: L140. arXiv:1005.2689. Bibcode:2010A&A...518L.140K. doi:10.1051/0004-6361/201014633. S2CID55820070.