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Jessie L. Christiansen, Ian J. M. Crossfield, Geert Barentsen, Chris J. Lintott, Thomas Barclay, Brooke D. Simmons, Erik Petigura, Joshua E. Schlieder, Courtney D. Dressing: The K2-138 System: A Near-Resonant Chain of Five Sub-Neptune Planets Discovered by Citizen Scientists. In: The Astronomical Journal. 155. Jahrgang, Nr.2, 11. Januar 2018, S.57, doi:10.3847/1538-3881/aa9be0, arxiv:1801.03874, bibcode:2018AJ....155...57C.
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Marton Hidas, John Webb, Michael Ashley, Andre Phillips, Jesse Christiansen, Duane Willis Hamacher, Stephen Curran, M. Irwin, S. Agrain: The University of New South Wales Extrasolar Planet Search. In: Transiting Extrapolar Planets Workshop. 2007, S.45–50 (englisch, monash.edu).
Michael Ashley. In: newt.phys.unsw.edu.au. Abgerufen am 16. Januar 2018.
handle.unsw.edu.au
http://handle.unsw.edu.au/1959.4/43629A tale of two surveys: searching for extrasolar planets from Australia and Antarctica, University of New South Wales, 2007