^ 3.03.1Stark, Christopher C.; Kuchner, Marc J.; Traub, Wesley A.; Monnier, John D.; Serabyn, Eugene; Colavita, Mark; Koresko, Chris; Mennesson, Bertrand & Keller, Luke D., 51 Ophiuchus: A Possible Beta Pictoris Analog Measured with the Keck Interferometer Nuller, Astrophysical Journal, 2009, 703 (2): 1188–1197, doi:10.1088/0004-637X/703/2/1188